390816408 has 16 divisors (see below), whose sum is σ = 977041080. Its totient is φ = 130272128.

The previous prime is 390816407. The next prime is 390816443. The reversal of 390816408 is 804618093.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (390816401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8141985 + ... + 8142032.

Almost surely, 2^390816408 is an apocalyptic number.

It is an amenable number.

390816408 is an abundant number, since it is smaller than the sum of its proper divisors (586224672).

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

390816408 is a wasteful number, since it uses less digits than its factorization.

390816408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16284026 (or 16284022 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 39.

The square root of 390816408 is about 19769.0770649517. The cubic root of 390816408 is about 731.1238135392.

The spelling of 390816408 in words is "three hundred ninety million, eight hundred sixteen thousand, four hundred eight".