397874432 has 36 divisors (see below), whose sum is σ = 821596020. Its totient is φ = 192073728.

The previous prime is 397874423. The next prime is 397874437. The reversal of 397874432 is 234478793.

It can be written as a sum of positive squares in 2 ways, for example, as 195552256 + 202322176 = 13984^2 + 14224^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397874437) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 19373 + ... + 34220.

Almost surely, 2^397874432 is an apocalyptic number.

397874432 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

397874432 is an abundant number, since it is smaller than the sum of its proper divisors (423721588).

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

397874432 is an equidigital number, since it uses as much as digits as its factorization.

397874432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53638 (or 53624 counting only the distinct ones).

The product of its digits is 1016064, while the sum is 47.

The square root of 397874432 is about 19946.7900174439. The cubic root of 397874432 is about 735.4988712185.

The spelling of 397874432 in words is "three hundred ninety-seven million, eight hundred seventy-four thousand, four hundred thirty-two".