428188908 has 48 divisors (see below), whose sum is σ = 1163393280. Its totient is φ = 120030144.

The previous prime is 428188889. The next prime is 428188919. The reversal of 428188908 is 809881824.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43638 + ... + 52541.

It is an arithmetic number, because the mean of its divisors is an integer number (24237360).

Almost surely, 2^428188908 is an apocalyptic number.

It is an amenable number.

428188908 is an abundant number, since it is smaller than the sum of its proper divisors (735204372).

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

428188908 is a wasteful number, since it uses less digits than its factorization.

428188908 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96246 (or 96244 counting only the distinct ones).

The product of its (nonzero) digits is 294912, while the sum is 48.

The square root of 428188908 is about 20692.7259683204. The cubic root of 428188908 is about 753.7230629329.

The spelling of 428188908 in words is "four hundred twenty-eight million, one hundred eighty-eight thousand, nine hundred eight".