428823728 has 20 divisors (see below), whose sum is σ = 831167040. Its totient is φ = 214329024.

The previous prime is 428823727. The next prime is 428823739. The reversal of 428823728 is 827328824.

It is a hoax number, since the sum of its digits (44) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (428823721) 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, 78593 + ... + 83871.

It is an arithmetic number, because the mean of its divisors is an integer number (41558352).

Almost surely, 2^428823728 is an apocalyptic number.

It is an amenable number.

428823728 is a deficient number, since it is larger than the sum of its proper divisors (402343312).

428823728 is a wasteful number, since it uses less digits than its factorization.

428823728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10364 (or 10358 counting only the distinct ones).

The product of its digits is 344064, while the sum is 44.

The square root of 428823728 is about 20708.0594938299. The cubic root of 428823728 is about 754.0953613906.

The spelling of 428823728 in words is "four hundred twenty-eight million, eight hundred twenty-three thousand, seven hundred twenty-eight".