390986688 has 56 divisors (see below), whose sum is σ = 1039837392. Its totient is φ = 129654784.

The previous prime is 390986669. The next prime is 390986711. The reversal of 390986688 is 886689093.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32656 + ... + 42992.

Almost surely, 2^390986688 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 390986688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (519918696).

390986688 is an abundant number, since it is smaller than the sum of its proper divisors (648850704).

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

390986688 is a wasteful number, since it uses less digits than its factorization.

390986688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10549 (or 10539 counting only the distinct ones).

The product of its (nonzero) digits is 4478976, while the sum is 57.

The square root of 390986688 is about 19773.3833220317. The cubic root of 390986688 is about 731.2299824749.

The spelling of 390986688 in words is "three hundred ninety million, nine hundred eighty-six thousand, six hundred eighty-eight".