78031504 has 10 divisors (see below), whose sum is σ = 151186070. Its totient is φ = 39015744.

The previous prime is 78031493. The next prime is 78031507. The reversal of 78031504 is 40513087.

It can be written as a sum of positive squares in only one way, i.e., 46895104 + 31136400 = 6848^2 + 5580^2 .

It is not an unprimeable number, because it can be changed into a prime (78031507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2438469 + ... + 2438500.

It is an arithmetic number, because the mean of its divisors is an integer number (15118607).

Almost surely, 2^78031504 is an apocalyptic number.

It is an amenable number.

78031504 is a deficient number, since it is larger than the sum of its proper divisors (73154566).

78031504 is a wasteful number, since it uses less digits than its factorization.

78031504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4876977 (or 4876971 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 78031504 is about 8833.5442490543. The cubic root of 78031504 is about 427.3233842898.

The spelling of 78031504 in words is "seventy-eight million, thirty-one thousand, five hundred four".