78597992 has 32 divisors (see below), whose sum is σ = 167762880. Its totient is φ = 34172160.

The previous prime is 78597913. The next prime is 78597997. The reversal of 78597992 is 29979587.

It is not an unprimeable number, because it can be changed into a prime (78597997) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17393 + ... + 21440.

It is an arithmetic number, because the mean of its divisors is an integer number (5242590).

Almost surely, 2^78597992 is an apocalyptic number.

It is an amenable number.

78597992 is an abundant number, since it is smaller than the sum of its proper divisors (89164888).

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

78597992 is a wasteful number, since it uses less digits than its factorization.

78597992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38873 (or 38869 counting only the distinct ones).

The product of its digits is 2857680, while the sum is 56.

The square root of 78597992 is about 8865.5508571098. The cubic root of 78597992 is about 428.3549767090.

It can be divided in two parts, 7859 and 7992, that added together give a palindrome (15851).

The spelling of 78597992 in words is "seventy-eight million, five hundred ninety-seven thousand, nine hundred ninety-two".