78090804 has 60 divisors (see below), whose sum is σ = 222713568. Its totient is φ = 23662800.

The previous prime is 78090791. The next prime is 78090833. The reversal of 78090804 is 40809087.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 7392 + ... + 14519.

Almost surely, 2^78090804 is an apocalyptic number.

It is an amenable number.

78090804 is an abundant number, since it is smaller than the sum of its proper divisors (144622764).

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

78090804 is a wasteful number, since it uses less digits than its factorization.

78090804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21938 (or 21927 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 36.

The square root of 78090804 is about 8836.9001352284. The cubic root of 78090804 is about 427.4316049400.

The spelling of 78090804 in words is "seventy-eight million, ninety thousand, eight hundred four".