428434872 has 32 divisors (see below), whose sum is σ = 1089244800. Its totient is φ = 140390624.

The previous prime is 428434847. The next prime is 428434891. The reversal of 428434872 is 278434824.

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

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, 149868 + ... + 152699.

It is an arithmetic number, because the mean of its divisors is an integer number (34038900).

Almost surely, 2^428434872 is an apocalyptic number.

It is an amenable number.

428434872 is an abundant number, since it is smaller than the sum of its proper divisors (660809928).

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

428434872 is a wasteful number, since it uses less digits than its factorization.

428434872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 302635 (or 302631 counting only the distinct ones).

The product of its digits is 344064, while the sum is 42.

The square root of 428434872 is about 20698.6683629648. The cubic root of 428434872 is about 753.8673553622.

The spelling of 428434872 in words is "four hundred twenty-eight million, four hundred thirty-four thousand, eight hundred seventy-two".