390377856 has 64 divisors (see below), whose sum is σ = 1131220800. Its totient is φ = 118295040.

The previous prime is 390377849. The next prime is 390377863. The reversal of 390377856 is 658773093.

It is an interprime number because it is at equal distance from previous prime (390377849) and next prime (390377863).

It is a tau number, because it is divible by the number of its divisors (64).

It is a Harshad number since it is a multiple of its sum of digits (48).

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 7 ways as a sum of consecutive naturals, for example, 41986 + ... + 50433.

It is an arithmetic number, because the mean of its divisors is an integer number (17675325).

Almost surely, 2^390377856 is an apocalyptic number.

It is an amenable number.

390377856 is an abundant number, since it is smaller than the sum of its proper divisors (740842944).

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

390377856 is a wasteful number, since it uses less digits than its factorization.

390377856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92447 (or 92435 counting only the distinct ones).

The product of its (nonzero) digits is 952560, while the sum is 48.

The square root of 390377856 is about 19757.9820831987. The cubic root of 390377856 is about 730.8502359616.

The spelling of 390377856 in words is "three hundred ninety million, three hundred seventy-seven thousand, eight hundred fifty-six".