428800556 has 24 divisors (see below), whose sum is σ = 779283456. Its totient is φ = 206231760.

The previous prime is 428800553. The next prime is 428800579. The reversal of 428800556 is 655008824.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (428800553) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10355 + ... + 31061.

It is an arithmetic number, because the mean of its divisors is an integer number (32470144).

Almost surely, 2^428800556 is an apocalyptic number.

It is a pronic number, being equal to 20707×20708.

It is an amenable number.

428800556 is a deficient number, since it is larger than the sum of its proper divisors (350482900).

428800556 is a wasteful number, since it uses less digits than its factorization.

428800556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20909 (or 20907 counting only the distinct ones).

The product of its (nonzero) digits is 76800, while the sum is 38.

The square root of 428800556 is about 20707.4999939635. The cubic root of 428800556 is about 754.0817783328.

The spelling of 428800556 in words is "four hundred twenty-eight million, eight hundred thousand, five hundred fifty-six".