78905056 has 24 divisors (see below), whose sum is σ = 160702920. Its totient is φ = 38091648.

The previous prime is 78905051. The next prime is 78905063. The reversal of 78905056 is 65050987.

It is a happy number.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78905051) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41586 + ... + 43441.

It is an arithmetic number, because the mean of its divisors is an integer number (6695955).

Almost surely, 2^78905056 is an apocalyptic number.

It is an amenable number.

78905056 is an abundant number, since it is smaller than the sum of its proper divisors (81797864).

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

78905056 is a wasteful number, since it uses less digits than its factorization.

78905056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85066 (or 85058 counting only the distinct ones).

The product of its (nonzero) digits is 75600, while the sum is 40.

The square root of 78905056 is about 8882.8517943282. The cubic root of 78905056 is about 428.9120794681.

The spelling of 78905056 in words is "seventy-eight million, nine hundred five thousand, fifty-six".