390492864 has 168 divisors, whose sum is σ = 1217249280. Its totient is φ = 119232000.

The previous prime is 390492821. The next prime is 390492887. The reversal of 390492864 is 468294093.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 338689 + ... + 339839.

Almost surely, 2^390492864 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 390492864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (608624640).

390492864 is an abundant number, since it is smaller than the sum of its proper divisors (826756416).

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

390492864 is a wasteful number, since it uses less digits than its factorization.

390492864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1219 (or 1206 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 45.

The square root of 390492864 is about 19760.8922875461. The cubic root of 390492864 is about 730.9220000825.

The spelling of 390492864 in words is "three hundred ninety million, four hundred ninety-two thousand, eight hundred sixty-four".