64639322 has 16 divisors (see below), whose sum is σ = 107354592. Its totient is φ = 28942320.

The previous prime is 64639319. The next prime is 64639327. The reversal of 64639322 is 22393646.

It is not an unprimeable number, because it can be changed into a prime (64639327) 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, 20453 + ... + 23400.

It is an arithmetic number, because the mean of its divisors is an integer number (6709662).

Almost surely, 2^64639322 is an apocalyptic number.

64639322 is a deficient number, since it is larger than the sum of its proper divisors (42715270).

64639322 is a wasteful number, since it uses less digits than its factorization.

64639322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43933.

The product of its digits is 46656, while the sum is 35.

The square root of 64639322 is about 8039.8583320852. The cubic root of 64639322 is about 401.3275102508.

The spelling of 64639322 in words is "sixty-four million, six hundred thirty-nine thousand, three hundred twenty-two".