64220444 has 6 divisors (see below), whose sum is σ = 112385784. Its totient is φ = 32110220.

The previous prime is 64220417. The next prime is 64220447. The reversal of 64220444 is 44402246.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64220447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8027552 + ... + 8027559.

It is an arithmetic number, because the mean of its divisors is an integer number (18730964).

Almost surely, 2^64220444 is an apocalyptic number.

It is an amenable number.

64220444 is a deficient number, since it is larger than the sum of its proper divisors (48165340).

64220444 is a wasteful number, since it uses less digits than its factorization.

64220444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16055115 (or 16055113 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 26.

The square root of 64220444 is about 8013.7659062391. The cubic root of 64220444 is about 400.4587320445.

The spelling of 64220444 in words is "sixty-four million, two hundred twenty thousand, four hundred forty-four".