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380002980 = 22357904769
BaseRepresentation
bin10110101001100…
…110001010100100
3222111001011002110
4112221212022210
51234240043410
6101412441020
712262654260
oct2651461244
9874034073
10380002980
11185557955
12a7319170
136095c646
143867b0a0
1523563720
hex16a662a4

380002980 has 48 divisors (see below), whose sum is σ = 1216010880. Its totient is φ = 86857728.

The previous prime is 380002969. The next prime is 380002993. The reversal of 380002980 is 89200083.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 451965 + ... + 452804.

It is an arithmetic number, because the mean of its divisors is an integer number (25333560).

Almost surely, 2380002980 is an apocalyptic number.

380002980 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

380002980 is an abundant number, since it is smaller than the sum of its proper divisors (836007900).

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

380002980 is a wasteful number, since it uses less digits than its factorization.

380002980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 904788 (or 904786 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 380002980 is about 19493.6651248553. The cubic root of 380002980 is about 724.3175377257.

The spelling of 380002980 in words is "three hundred eighty million, two thousand, nine hundred eighty".

Divisors: 1 2 3 4 5 6 7 10 12 14 15 20 21 28 30 35 42 60 70 84 105 140 210 420 904769 1809538 2714307 3619076 4523845 5428614 6333383 9047690 10857228 12666766 13571535 18095380 19000149 25333532 27143070 31666915 38000298 54286140 63333830 76000596 95000745 126667660 190001490 380002980