44449864 has 8 divisors (see below), whose sum is σ = 83343510. Its totient is φ = 22224928.

The previous prime is 44449861. The next prime is 44449871. The reversal of 44449864 is 46894444.

It can be written as a sum of positive squares in only one way, i.e., 22752900 + 21696964 = 4770^2 + 4658^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 44449864.

It is not an unprimeable number, because it can be changed into a prime (44449861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2778109 + ... + 2778124.

Almost surely, 2^44449864 is an apocalyptic number.

It is an amenable number.

44449864 is a deficient number, since it is larger than the sum of its proper divisors (38893646).

44449864 is a wasteful number, since it uses less digits than its factorization.

44449864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5556239 (or 5556235 counting only the distinct ones).

The product of its digits is 442368, while the sum is 43.

The square root of 44449864 is about 6667.0731209430. The cubic root of 44449864 is about 354.2339203186.

The spelling of 44449864 in words is "forty-four million, four hundred forty-nine thousand, eight hundred sixty-four".