390650688 has 112 divisors (see below), whose sum is σ = 1163035520. Its totient is φ = 130170240.

The previous prime is 390650647. The next prime is 390650693. The reversal of 390650688 is 886056093.

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 15 ways as a sum of consecutive naturals, for example, 138573 + ... + 141363.

Almost surely, 2^390650688 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 390650688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (581517760).

390650688 is an abundant number, since it is smaller than the sum of its proper divisors (772384832).

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

390650688 is an frugal number, since it uses more digits than its factorization.

390650688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2824 (or 2796 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 45.

The square root of 390650688 is about 19764.8852260771. The cubic root of 390650688 is about 731.0204581311.

The spelling of 390650688 in words is "three hundred ninety million, six hundred fifty thousand, six hundred eighty-eight".