78609804 has 48 divisors (see below), whose sum is σ = 225754368. Its totient is φ = 20731968.

The previous prime is 78609787. The next prime is 78609809. The reversal of 78609804 is 40890687.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (78609809) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34902 + ... + 37085.

It is an arithmetic number, because the mean of its divisors is an integer number (4703216).

Almost surely, 2^78609804 is an apocalyptic number.

It is an amenable number.

78609804 is an abundant number, since it is smaller than the sum of its proper divisors (147144564).

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

78609804 is a wasteful number, since it uses less digits than its factorization.

78609804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72014 (or 72012 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 42.

The square root of 78609804 is about 8866.2170061419. The cubic root of 78609804 is about 428.3764338965.

The spelling of 78609804 in words is "seventy-eight million, six hundred nine thousand, eight hundred four".