78159912 has 32 divisors (see below), whose sum is σ = 195946080. Its totient is φ = 25980480.

The previous prime is 78159881. The next prime is 78159937. The reversal of 78159912 is 21995187.

It is a super-2 number, since 2×78159912² = 12217943687695488, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4587 + ... + 13317.

It is an arithmetic number, because the mean of its divisors is an integer number (6123315).

Almost surely, 2^78159912 is an apocalyptic number.

It is an amenable number.

78159912 is an abundant number, since it is smaller than the sum of its proper divisors (117786168).

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

78159912 is a wasteful number, since it uses less digits than its factorization.

78159912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9113 (or 9109 counting only the distinct ones).

The product of its digits is 45360, while the sum is 42.

The square root of 78159912 is about 8840.8094652017. The cubic root of 78159912 is about 427.5576557784.

The spelling of 78159912 in words is "seventy-eight million, one hundred fifty-nine thousand, nine hundred twelve".