390055808 has 16 divisors (see below), whose sum is σ = 777064560. Its totient is φ = 195027840.

The previous prime is 390055793. The next prime is 390055811. The reversal of 390055808 is 808550093.

It is a tau number, because it is divible by the number of its divisors (16).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1523528 + ... + 1523783.

It is an arithmetic number, because the mean of its divisors is an integer number (48566535).

Almost surely, 2^390055808 is an apocalyptic number.

It is an amenable number.

390055808 is a deficient number, since it is larger than the sum of its proper divisors (387008752).

390055808 is an equidigital number, since it uses as much as digits as its factorization.

390055808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3047325 (or 3047313 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 38.

The square root of 390055808 is about 19749.8305815518. The cubic root of 390055808 is about 730.6492054245.

The spelling of 390055808 in words is "three hundred ninety million, fifty-five thousand, eight hundred eight".