390912808 has 64 divisors (see below), whose sum is σ = 890870400. Its totient is φ = 158350080.

The previous prime is 390912757. The next prime is 390912811. The reversal of 390912808 is 808219093.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27285 + ... + 39067.

It is an arithmetic number, because the mean of its divisors is an integer number (13919850).

Almost surely, 2^390912808 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 390912808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (445435200).

390912808 is an abundant number, since it is smaller than the sum of its proper divisors (499957592).

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

390912808 is a wasteful number, since it uses less digits than its factorization.

390912808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11842 (or 11838 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 40.

The square root of 390912808 is about 19771.5150658719. The cubic root of 390912808 is about 731.1839223610.

The spelling of 390912808 in words is "three hundred ninety million, nine hundred twelve thousand, eight hundred eight".