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1378726380 = 2233519313229
BaseRepresentation
bin101001000101101…
…1011000111101100
310120002022120001000
41102023123013230
510310423221010
6344450520300
746110660303
oct12213330754
93502276030
101378726380
11648289599
12325896090
1318c840735
14d117543a
15810917c0
hex522db1ec

1378726380 has 96 divisors (see below), whose sum is σ = 4311921600. Its totient is φ = 365727744.

The previous prime is 1378726373. The next prime is 1378726397. The reversal of 1378726380 is 836278731.

1378726380 is a `hidden beast` number, since 1 + 3 + 7 + 8 + 7 + 2 + 638 + 0 = 666.

1378726380 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 97606 + ... + 110834.

It is an arithmetic number, because the mean of its divisors is an integer number (44915850).

Almost surely, 21378726380 is an apocalyptic number.

1378726380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1378726380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2155960800).

1378726380 is an abundant number, since it is smaller than the sum of its proper divisors (2933195220).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1378726380 is a wasteful number, since it uses less digits than its factorization.

1378726380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13440 (or 13432 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 45.

The square root of 1378726380 is about 37131.2049360104. The cubic root of 1378726380 is about 1112.9936719077.

The spelling of 1378726380 in words is "one billion, three hundred seventy-eight million, seven hundred twenty-six thousand, three hundred eighty".

Divisors: 1 2 3 4 5 6 9 10 12 15 18 20 27 30 36 45 54 60 90 108 135 180 193 270 386 540 579 772 965 1158 1737 1930 2316 2895 3474 3860 5211 5790 6948 8685 10422 11580 13229 17370 20844 26055 26458 34740 39687 52110 52916 66145 79374 104220 119061 132290 158748 198435 238122 264580 357183 396870 476244 595305 714366 793740 1190610 1428732 1785915 2381220 2553197 3571830 5106394 7143660 7659591 10212788 12765985 15319182 22978773 25531970 30638364 38297955 45957546 51063940 68936319 76595910 91915092 114893865 137872638 153191820 229787730 275745276 344681595 459575460 689363190 1378726380