390874401988 has 48 divisors (see below), whose sum is σ = 799521184000. Its totient is φ = 167135754240.

The previous prime is 390874401919. The next prime is 390874401989. The reversal of 390874401988 is 889104478093.

It is not an unprimeable number, because it can be changed into a prime (390874401989) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 277828 + ... + 926788.

Almost surely, 2^390874401988 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 390874401988, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (399760592000).

390874401988 is an abundant number, since it is smaller than the sum of its proper divisors (408646782012).

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

390874401988 is a wasteful number, since it uses less digits than its factorization.

390874401988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 649425 (or 649409 counting only the distinct ones).

The product of its (nonzero) digits is 13934592, while the sum is 61.

The spelling of 390874401988 in words is "three hundred ninety billion, eight hundred seventy-four million, four hundred one thousand, nine hundred eighty-eight".