64568442 has 16 divisors (see below), whose sum is σ = 133590240. Its totient is φ = 20780592.

The previous prime is 64568417. The next prime is 64568447. The reversal of 64568442 is 24486546.

It is a self number, because there is not a number n which added to its sum of digits gives 64568442.

It is not an unprimeable number, because it can be changed into a prime (64568447) 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, 185368 + ... + 185715.

It is an arithmetic number, because the mean of its divisors is an integer number (8349390).

Almost surely, 2^64568442 is an apocalyptic number.

64568442 is an abundant number, since it is smaller than the sum of its proper divisors (69021798).

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

64568442 is a wasteful number, since it uses less digits than its factorization.

64568442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 371117.

The product of its digits is 184320, while the sum is 39.

The square root of 64568442 is about 8035.4490851476. The cubic root of 64568442 is about 401.1807652208.

The spelling of 64568442 in words is "sixty-four million, five hundred sixty-eight thousand, four hundred forty-two".