390837231988 has 48 divisors (see below), whose sum is σ = 797393237760. Its totient is φ = 164141063424.

The previous prime is 390837231943. The next prime is 390837231991. The reversal of 390837231988 is 889132738093.

It is a congruent number.

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, 1061328 + ... + 1381336.

It is an arithmetic number, because the mean of its divisors is an integer number (16612359120).

Almost surely, 2^390837231988 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 390837231988, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (398696618880).

390837231988 is an abundant number, since it is smaller than the sum of its proper divisors (406556005772).

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

390837231988 is a wasteful number, since it uses less digits than its factorization.

390837231988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 320896 (or 320894 counting only the distinct ones).

The product of its (nonzero) digits is 15676416, while the sum is 61.

The spelling of 390837231988 in words is "three hundred ninety billion, eight hundred thirty-seven million, two hundred thirty-one thousand, nine hundred eighty-eight".