431215428 has 24 divisors (see below), whose sum is σ = 1149908032. Its totient is φ = 123204384.

The previous prime is 431215403. The next prime is 431215441. The reversal of 431215428 is 824512134.

It is a junction number, because it is equal to n+sod(n) for n = 431215395 and 431215404.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2566675 + ... + 2566842.

Almost surely, 2^431215428 is an apocalyptic number.

It is an amenable number.

431215428 is an abundant number, since it is smaller than the sum of its proper divisors (718692604).

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

431215428 is a wasteful number, since it uses less digits than its factorization.

431215428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5133531 (or 5133529 counting only the distinct ones).

The product of its digits is 7680, while the sum is 30.

The square root of 431215428 is about 20765.7272446693. The cubic root of 431215428 is about 755.4947142890.

The spelling of 431215428 in words is "four hundred thirty-one million, two hundred fifteen thousand, four hundred twenty-eight".