431956 has 12 divisors (see below), whose sum is σ = 863968. Its totient is φ = 185112.

The previous prime is 431947. The next prime is 431983. The reversal of 431956 is 659134.

431956 is an admirable number.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (28), and also a Moran number because the ratio is a prime number: 15427 = 431956 / (4 + 3 + 1 + 9 + 5 + 6).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7686 + ... + 7741.

2⁴³¹⁹⁵⁶ is an apocalyptic number.

It is an amenable number.

431956 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

431956 is a wasteful number, since it uses less digits than its factorization.

431956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15438 (or 15436 counting only the distinct ones).

The product of its digits is 3240, while the sum is 28.

The square root of 431956 is about 657.2335962198. The cubic root of 431956 is about 75.5926964007.

The spelling of 431956 in words is "four hundred thirty-one thousand, nine hundred fifty-six".