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71056908 = 2232131491019
BaseRepresentation
bin1000011110000…
…11111000001100
311221201001202100
410033003320030
5121142310113
611014555100
71521654666
oct417037014
9157631670
1071056908
113712311a
121b968a90
131194b910
149619536
156388d73
hex43c3e0c

71056908 has 72 divisors (see below), whose sum is σ = 194922000. Its totient is φ = 21695616.

The previous prime is 71056907. The next prime is 71056949. The reversal of 71056908 is 80965017.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (71056901) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 69223 + ... + 70241.

It is an arithmetic number, because the mean of its divisors is an integer number (2707250).

Almost surely, 271056908 is an apocalyptic number.

71056908 is a gapful number since it is divisible by the number (78) 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 71056908, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (97461000).

71056908 is an abundant number, since it is smaller than the sum of its proper divisors (123865092).

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

71056908 is a wasteful number, since it uses less digits than its factorization.

71056908 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1191 (or 1186 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 36.

The square root of 71056908 is about 8429.5259653198. The cubic root of 71056908 is about 414.1923771611.

The spelling of 71056908 in words is "seventy-one million, fifty-six thousand, nine hundred eight".

Divisors: 1 2 3 4 6 9 12 13 18 26 36 39 52 78 117 149 156 234 298 447 468 596 894 1019 1341 1788 1937 2038 2682 3057 3874 4076 5364 5811 6114 7748 9171 11622 12228 13247 17433 18342 23244 26494 34866 36684 39741 52988 69732 79482 119223 151831 158964 238446 303662 455493 476892 607324 910986 1366479 1821972 1973803 2732958 3947606 5465916 5921409 7895212 11842818 17764227 23685636 35528454 71056908