428639884 has 12 divisors (see below), whose sum is σ = 757002400. Its totient is φ = 212353488.

The previous prime is 428639881. The next prime is 428639899. The reversal of 428639884 is 488936824.

It is not an unprimeable number, because it can be changed into a prime (428639881) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 491124 + ... + 491995.

Almost surely, 2^428639884 is an apocalyptic number.

It is an amenable number.

428639884 is a deficient number, since it is larger than the sum of its proper divisors (328362516).

428639884 is a wasteful number, since it uses less digits than its factorization.

428639884 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 983232 (or 983230 counting only the distinct ones).

The product of its digits is 2654208, while the sum is 52.

The square root of 428639884 is about 20703.6200699298. The cubic root of 428639884 is about 753.9875814994.

The spelling of 428639884 in words is "four hundred twenty-eight million, six hundred thirty-nine thousand, eight hundred eighty-four".