78398804 has 36 divisors (see below), whose sum is σ = 154352352. Its totient is φ = 34797840.

The previous prime is 78398767. The next prime is 78398813. The reversal of 78398804 is 40889387.

It is a super-2 number, since 2×78398804² = 12292744937260832, 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 11 ways as a sum of consecutive naturals, for example, 18929 + ... + 22695.

Almost surely, 2^78398804 is an apocalyptic number.

It is an amenable number.

78398804 is a deficient number, since it is larger than the sum of its proper divisors (75953548).

78398804 is a wasteful number, since it uses less digits than its factorization.

78398804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3836 (or 3823 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 47.

The square root of 78398804 is about 8854.3099109981. The cubic root of 78398804 is about 427.9928158459.

The spelling of 78398804 in words is "seventy-eight million, three hundred ninety-eight thousand, eight hundred four".