78816004 has 12 divisors (see below), whose sum is σ = 138420828. Its totient is φ = 39267200.

The previous prime is 78815999. The next prime is 78816007. The reversal of 78816004 is 40061887.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 26543104 + 52272900 = 5152^2 + 7230^2 .

It is not an unprimeable number, because it can be changed into a prime (78816007) 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, 33937 + ... + 36184.

It is an arithmetic number, because the mean of its divisors is an integer number (11535069).

Almost surely, 2^78816004 is an apocalyptic number.

It is an amenable number.

78816004 is a deficient number, since it is larger than the sum of its proper divisors (59604824).

78816004 is a wasteful number, since it uses less digits than its factorization.

78816004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70406 (or 70404 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 34.

The square root of 78816004 is about 8877.8377998249. The cubic root of 78816004 is about 428.7506624497.

The spelling of 78816004 in words is "seventy-eight million, eight hundred sixteen thousand, four".