78190804 has 18 divisors (see below), whose sum is σ = 141397242. Its totient is φ = 37832400.

The previous prime is 78190793. The next prime is 78190841. The reversal of 78190804 is 40809187.

It can be written as a sum of positive squares in only one way, i.e., 70056900 + 8133904 = 8370^2 + 2852^2 .

It is a super-2 number, since 2×78190804² = 12227603660332832, which contains 22 as substring.

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 5 ways as a sum of consecutive naturals, for example, 6327 + ... + 14014.

Almost surely, 2^78190804 is an apocalyptic number.

It is an amenable number.

78190804 is a deficient number, since it is larger than the sum of its proper divisors (63206438).

78190804 is a wasteful number, since it uses less digits than its factorization.

78190804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20407 (or 20374 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 37.

The square root of 78190804 is about 8842.5564176883. The cubic root of 78190804 is about 427.6139777940.

The spelling of 78190804 in words is "seventy-eight million, one hundred ninety thousand, eight hundred four".