427583664 has 40 divisors (see below), whose sum is σ = 1227324720. Its totient is φ = 142527744.

The previous prime is 427583573. The next prime is 427583669. The reversal of 427583664 is 466385724.

427583664 is a `hidden beast` number, since 4 + 2 + 7 + 583 + 6 + 64 = 666.

It is not an unprimeable number, because it can be changed into a prime (427583669) 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, 494457 + ... + 495320.

It is an arithmetic number, because the mean of its divisors is an integer number (30683118).

Almost surely, 2^427583664 is an apocalyptic number.

It is an amenable number.

427583664 is an abundant number, since it is smaller than the sum of its proper divisors (799741056).

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

427583664 is a wasteful number, since it uses less digits than its factorization.

427583664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 989794 (or 989782 counting only the distinct ones).

The product of its digits is 967680, while the sum is 45.

The square root of 427583664 is about 20678.0962373232. The cubic root of 427583664 is about 753.3677668931.

The spelling of 427583664 in words is "four hundred twenty-seven million, five hundred eighty-three thousand, six hundred sixty-four".