64438022 has 16 divisors (see below), whose sum is σ = 106278912. Its totient is φ = 29058120.

The previous prime is 64438013. The next prime is 64438027. The reversal of 64438022 is 22083446.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64438027) 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, 8738 + ... + 14325.

It is an arithmetic number, because the mean of its divisors is an integer number (6642432).

Almost surely, 2^64438022 is an apocalyptic number.

64438022 is a deficient number, since it is larger than the sum of its proper divisors (41840890).

64438022 is a wasteful number, since it uses less digits than its factorization.

64438022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23203.

The product of its (nonzero) digits is 9216, while the sum is 29.

The square root of 64438022 is about 8027.3296929926. The cubic root of 64438022 is about 400.9104718634.

The spelling of 64438022 in words is "sixty-four million, four hundred thirty-eight thousand, twenty-two".