397894432 has 24 divisors (see below), whose sum is σ = 843613596. Its totient is φ = 183643392.

The previous prime is 397894417. The next prime is 397894439. The reversal of 397894432 is 234498793.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 329930896 + 67963536 = 18164^2 + 8244^2 .

It is not an unprimeable number, because it can be changed into a prime (397894439) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 477823 + ... + 478654.

Almost surely, 2^397894432 is an apocalyptic number.

397894432 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

397894432 is an abundant number, since it is smaller than the sum of its proper divisors (445719164).

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

397894432 is a wasteful number, since it uses less digits than its factorization.

397894432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 956500 (or 956492 counting only the distinct ones).

The product of its digits is 1306368, while the sum is 49.

The square root of 397894432 is about 19947.2913449420. The cubic root of 397894432 is about 735.5111948142.

The spelling of 397894432 in words is "three hundred ninety-seven million, eight hundred ninety-four thousand, four hundred thirty-two".