Search a number
-
+
12481680 = 2435131397
BaseRepresentation
bin101111100111…
…010010010000
3212111010122110
4233213102100
511143403210
61123305320
7211043511
oct57472220
925433573
1012481680
117055742
12421b240
132780313
14192ca08
151168420
hexbe7490

12481680 has 80 divisors (see below), whose sum is σ = 39086784. Its totient is φ = 3294720.

The previous prime is 12481673. The next prime is 12481771. The reversal of 12481680 is 8618421.

12481680 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (80).

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

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31242 + ... + 31638.

Almost surely, 212481680 is an apocalyptic number.

12481680 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 12481680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19543392).

12481680 is an abundant number, since it is smaller than the sum of its proper divisors (26605104).

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

12481680 is a wasteful number, since it uses less digits than its factorization.

12481680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 544 (or 538 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 30.

The square root of 12481680 is about 3532.9421167067. The cubic root of 12481680 is about 231.9660077031.

The spelling of 12481680 in words is "twelve million, four hundred eighty-one thousand, six hundred eighty".

Divisors: 1 2 3 4 5 6 8 10 12 15 16 20 24 30 40 48 60 80 120 131 240 262 393 397 524 655 786 794 1048 1191 1310 1572 1588 1965 1985 2096 2382 2620 3144 3176 3930 3970 4764 5240 5955 6288 6352 7860 7940 9528 10480 11910 15720 15880 19056 23820 31440 31760 47640 52007 95280 104014 156021 208028 260035 312042 416056 520070 624084 780105 832112 1040140 1248168 1560210 2080280 2496336 3120420 4160560 6240840 12481680