428625084 has 12 divisors (see below), whose sum is σ = 1000125224. Its totient is φ = 142875024.

The previous prime is 428625077. The next prime is 428625089. The reversal of 428625084 is 480526824.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428625089) 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, 17859367 + ... + 17859390.

Almost surely, 2^428625084 is an apocalyptic number.

It is an amenable number.

428625084 is an abundant number, since it is smaller than the sum of its proper divisors (571500140).

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

428625084 is a wasteful number, since it uses less digits than its factorization.

428625084 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35718764 (or 35718762 counting only the distinct ones).

The product of its (nonzero) digits is 122880, while the sum is 39.

The square root of 428625084 is about 20703.2626414292. The cubic root of 428625084 is about 753.9789035508.

The spelling of 428625084 in words is "four hundred twenty-eight million, six hundred twenty-five thousand, eighty-four".