78023904 has 48 divisors (see below), whose sum is σ = 234073728. Its totient is φ = 22292352.

The previous prime is 78023893. The next prime is 78023921. The reversal of 78023904 is 40932087.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 57382 + ... + 58725.

It is an arithmetic number, because the mean of its divisors is an integer number (4876536).

Almost surely, 2^78023904 is an apocalyptic number.

It is an amenable number.

78023904 is an abundant number, since it is smaller than the sum of its proper divisors (156049824).

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

78023904 is a wasteful number, since it uses less digits than its factorization.

78023904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116127 (or 116119 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 33.

The square root of 78023904 is about 8833.1140601715. The cubic root of 78023904 is about 427.3095105636.

The spelling of 78023904 in words is "seventy-eight million, twenty-three thousand, nine hundred four".