78789904 has 40 divisors (see below), whose sum is σ = 160114752. Its totient is φ = 37488000.

The previous prime is 78789901. The next prime is 78789913. The reversal of 78789904 is 40998787.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (78789901) 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 in 7 ways as a sum of consecutive naturals, for example, 91942 + ... + 92794.

Almost surely, 2^78789904 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78789904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80057376).

78789904 is an abundant number, since it is smaller than the sum of its proper divisors (81324848).

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

78789904 is a wasteful number, since it uses less digits than its factorization.

78789904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1135 (or 1129 counting only the distinct ones).

The product of its (nonzero) digits is 1016064, while the sum is 52.

The square root of 78789904 is about 8876.3677255959. The cubic root of 78789904 is about 428.7033301518.

The spelling of 78789904 in words is "seventy-eight million, seven hundred eighty-nine thousand, nine hundred four".