428544564 has 48 divisors (see below), whose sum is σ = 1144311168. Its totient is φ = 122277888.

The previous prime is 428544547. The next prime is 428544577. The reversal of 428544564 is 465445824.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

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, 69012 + ... + 74964.

It is an arithmetic number, because the mean of its divisors is an integer number (23839816).

Almost surely, 2^428544564 is an apocalyptic number.

It is an amenable number.

428544564 is an abundant number, since it is smaller than the sum of its proper divisors (715766604).

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

428544564 is a wasteful number, since it uses less digits than its factorization.

428544564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6824 (or 6822 counting only the distinct ones).

The product of its digits is 614400, while the sum is 42.

The square root of 428544564 is about 20701.3179290595. The cubic root of 428544564 is about 753.9316873195.

The spelling of 428544564 in words is "four hundred twenty-eight million, five hundred forty-four thousand, five hundred sixty-four".