428000664 has 64 divisors (see below), whose sum is σ = 1316931840. Its totient is φ = 112878720.

The previous prime is 428000633. The next prime is 428000701. The reversal of 428000664 is 466000824.

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, 95802 + ... + 100169.

It is an arithmetic number, because the mean of its divisors is an integer number (20577060).

Almost surely, 2^428000664 is an apocalyptic number.

It is an amenable number.

428000664 is an abundant number, since it is smaller than the sum of its proper divisors (888931176).

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

428000664 is a wasteful number, since it uses less digits than its factorization.

428000664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196000 (or 195996 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 30.

The square root of 428000664 is about 20688.1769133967. The cubic root of 428000664 is about 753.6125940575.

The spelling of 428000664 in words is "four hundred twenty-eight million, six hundred sixty-four", and thus it is an aban number.