431231028 has 24 divisors (see below), whose sum is σ = 1021225632. Its totient is φ = 141597984.

The previous prime is 431230991. The next prime is 431231033. The reversal of 431231028 is 820132134.

It is a junction number, because it is equal to n+sod(n) for n = 431230989 and 431231007.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 267375 + ... + 268982.

It is an arithmetic number, because the mean of its divisors is an integer number (42551068).

Almost surely, 2^431231028 is an apocalyptic number.

It is an amenable number.

431231028 is an abundant number, since it is smaller than the sum of its proper divisors (589994604).

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

431231028 is a wasteful number, since it uses less digits than its factorization.

431231028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 536431 (or 536429 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 431231028 is about 20766.1028601902. The cubic root of 431231028 is about 755.5038246429.

The spelling of 431231028 in words is "four hundred thirty-one million, two hundred thirty-one thousand, twenty-eight".