428422631 has 24 divisors (see below), whose sum is σ = 549221904. Its totient is φ = 331067520.

The previous prime is 428422607. The next prime is 428422637. The reversal of 428422631 is 136224824.

It is a de Polignac number, because none of the positive numbers 2^k-428422631 is a prime.

It is a super-2 number, since 2×428422631² = 367091901505924322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428422637) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19571 + ... + 35211.

It is an arithmetic number, because the mean of its divisors is an integer number (22884246).

Almost surely, 2^428422631 is an apocalyptic number.

428422631 is a deficient number, since it is larger than the sum of its proper divisors (120799273).

428422631 is a wasteful number, since it uses less digits than its factorization.

428422631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15711 (or 15704 counting only the distinct ones).

The product of its digits is 18432, while the sum is 32.

The square root of 428422631 is about 20698.3726655020. The cubic root of 428422631 is about 753.8601756026.

The spelling of 428422631 in words is "four hundred twenty-eight million, four hundred twenty-two thousand, six hundred thirty-one".