390476808 has 128 divisors (see below), whose sum is σ = 1175644800. Its totient is φ = 119605248.

The previous prime is 390476803. The next prime is 390476813. The reversal of 390476808 is 808674093.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (390476803) and next prime (390476813).

It is not an unprimeable number, because it can be changed into a prime (390476803) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 156660 + ... + 159132.

It is an arithmetic number, because the mean of its divisors is an integer number (9184725).

Almost surely, 2^390476808 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 390476808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (587822400).

390476808 is an abundant number, since it is smaller than the sum of its proper divisors (785167992).

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

390476808 is a wasteful number, since it uses less digits than its factorization.

390476808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2548 (or 2538 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 45.

The square root of 390476808 is about 19760.4860264114. The cubic root of 390476808 is about 730.9119821065.

The spelling of 390476808 in words is "three hundred ninety million, four hundred seventy-six thousand, eight hundred eight".