397758984 has 64 divisors (see below), whose sum is σ = 1139635200. Its totient is φ = 113327424.

The previous prime is 397758973. The next prime is 397758997. The reversal of 397758984 is 489857793.

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, 60549 + ... + 66795.

It is an arithmetic number, because the mean of its divisors is an integer number (17806800).

Almost surely, 2^397758984 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 397758984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (569817600).

397758984 is an abundant number, since it is smaller than the sum of its proper divisors (741876216).

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

397758984 is a wasteful number, since it uses less digits than its factorization.

397758984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6642 (or 6638 counting only the distinct ones).

The product of its digits is 15240960, while the sum is 60.

The square root of 397758984 is about 19943.8959082723. The cubic root of 397758984 is about 735.4277264209.

The spelling of 397758984 in words is "three hundred ninety-seven million, seven hundred fifty-eight thousand, nine hundred eighty-four".