44001564 has 12 divisors (see below), whose sum is σ = 102670344. Its totient is φ = 14667184.

The previous prime is 44001533. The next prime is 44001619. The reversal of 44001564 is 46510044.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×44001564² = 3872275268892192, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1833387 + ... + 1833410.

It is an arithmetic number, because the mean of its divisors is an integer number (8555862).

Almost surely, 2^44001564 is an apocalyptic number.

It is an amenable number.

44001564 is an abundant number, since it is smaller than the sum of its proper divisors (58668780).

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

44001564 is a wasteful number, since it uses less digits than its factorization.

44001564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3666804 (or 3666802 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 44001564 is about 6633.3674705989. The cubic root of 44001564 is about 353.0390164109.

The spelling of 44001564 in words is "forty-four million, one thousand, five hundred sixty-four".