64574442 has 32 divisors (see below), whose sum is σ = 145324800. Its totient is φ = 21250944.

The previous prime is 64574441. The next prime is 64574453. The reversal of 64574442 is 24447546.

64574442 is a `hidden beast` number, since 645 + 7 + 4 + 4 + 4 + 2 = 666.

It is a super-2 number, since 2×64574442² = 8339717119222728, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 64574397 and 64574406.

It is not an unprimeable number, because it can be changed into a prime (64574441) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3303 + ... + 11834.

It is an arithmetic number, because the mean of its divisors is an integer number (4541400).

Almost surely, 2^64574442 is an apocalyptic number.

64574442 is an abundant number, since it is smaller than the sum of its proper divisors (80750358).

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

64574442 is a wasteful number, since it uses less digits than its factorization.

64574442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15227 (or 15221 counting only the distinct ones).

The product of its digits is 107520, while the sum is 36.

The square root of 64574442 is about 8035.8224221295. The cubic root of 64574442 is about 401.1931913635.

The spelling of 64574442 in words is "sixty-four million, five hundred seventy-four thousand, four hundred forty-two".