428564 has 12 divisors (see below), whose sum is σ = 789600. Its totient is φ = 202968.

The previous prime is 428563. The next prime is 428567. The reversal of 428564 is 465824.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2744 + ... + 2895.

It is an arithmetic number, because the mean of its divisors is an integer number (65800).

2⁴²⁸⁵⁶⁴ is an apocalyptic number.

It is an amenable number.

428564 is a deficient number, since it is larger than the sum of its proper divisors (361036).

428564 is a wasteful number, since it uses less digits than its factorization.

428564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5662 (or 5660 counting only the distinct ones).

The product of its digits is 7680, while the sum is 29.

The square root of 428564 is about 654.6479970182. The cubic root of 428564 is about 75.3943084963.

The spelling of 428564 in words is "four hundred twenty-eight thousand, five hundred sixty-four".