397536984 has 160 divisors (see below), whose sum is σ = 1229437440. Its totient is φ = 119232000.

The previous prime is 397536973. The next prime is 397536989. The reversal of 397536984 is 489635793.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a self number, because there is not a number n which added to its sum of digits gives 397536984.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397536989) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 344809 + ... + 345959.

It is an arithmetic number, because the mean of its divisors is an integer number (7683984).

Almost surely, 2^397536984 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 397536984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (614718720).

397536984 is an abundant number, since it is smaller than the sum of its proper divisors (831900456).

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

397536984 is a wasteful number, since it uses less digits than its factorization.

397536984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1223 (or 1210 counting only the distinct ones).

The product of its digits is 4898880, while the sum is 54.

The square root of 397536984 is about 19938.3295187937. The cubic root of 397536984 is about 735.2908802859.

The spelling of 397536984 in words is "three hundred ninety-seven million, five hundred thirty-six thousand, nine hundred eighty-four".