428820824 has 32 divisors (see below), whose sum is σ = 833408400. Its totient is φ = 206686080.

The previous prime is 428820803. The next prime is 428820839. The reversal of 428820824 is 428028824.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25619 + ... + 38909.

Almost surely, 2^428820824 is an apocalyptic number.

It is an amenable number.

428820824 is a deficient number, since it is larger than the sum of its proper divisors (404587576).

428820824 is a wasteful number, since it uses less digits than its factorization.

428820824 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13443 (or 13439 counting only the distinct ones).

The product of its (nonzero) digits is 65536, while the sum is 38.

The square root of 428820824 is about 20707.9893760838. The cubic root of 428820824 is about 754.0936591388.

The spelling of 428820824 in words is "four hundred twenty-eight million, eight hundred twenty thousand, eight hundred twenty-four".