431228 has 12 divisors (see below), whose sum is σ = 862512. Its totient is φ = 184800.

The previous prime is 431219. The next prime is 431237. The reversal of 431228 is 822134.

It is an interprime number because it is at equal distance from previous prime (431219) and next prime (431237).

431228 is an admirable number.

It is a hoax number, since the sum of its digits (20) coincides with the sum of the digits of its distinct prime factors.

It is a nialpdrome in base 14.

It is a congruent number.

It is an unprimeable number.

431228 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7673 + ... + 7728.

It is an arithmetic number, because the mean of its divisors is an integer number (71876).

2⁴³¹²²⁸ is an apocalyptic number.

It is an amenable number.

431228 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.

431228 is a wasteful number, since it uses less digits than its factorization.

431228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15412 (or 15410 counting only the distinct ones).

The product of its digits is 384, while the sum is 20.

The square root of 431228 is about 656.6795261008. The cubic root of 431228 is about 75.5502056317.

The spelling of 431228 in words is "four hundred thirty-one thousand, two hundred twenty-eight".