428566628 has 12 divisors (see below), whose sum is σ = 857133312. Its totient is φ = 183671400.

The previous prime is 428566601. The next prime is 428566643. The reversal of 428566628 is 826665824.

428566628 is an admirable number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7652948 + ... + 7653003.

It is an arithmetic number, because the mean of its divisors is an integer number (71427776).

Almost surely, 2^428566628 is an apocalyptic number.

It is an amenable number.

428566628 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

428566628 is a wasteful number, since it uses less digits than its factorization.

428566628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15305962 (or 15305960 counting only the distinct ones).

The product of its digits is 1105920, while the sum is 47.

The square root of 428566628 is about 20701.8508351307. The cubic root of 428566628 is about 753.9446260464.

The spelling of 428566628 in words is "four hundred twenty-eight million, five hundred sixty-six thousand, six hundred twenty-eight".