44464581 has 12 divisors (see below), whose sum is σ = 73401952. Its totient is φ = 25408296.

The previous prime is 44464577. The next prime is 44464591. The reversal of 44464581 is 18546444.

It is a happy number.

44464581 is a `hidden beast` number, since 4 + 4 + 4 + 645 + 8 + 1 = 666.

It is not a de Polignac number, because 44464581 - 2² = 44464577 is a prime.

It is a super-2 number, since 2×44464581² = 3954197927011122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (44464501) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 352831 + ... + 352956.

Almost surely, 2^44464581 is an apocalyptic number.

It is an amenable number.

44464581 is a deficient number, since it is larger than the sum of its proper divisors (28937371).

44464581 is a wasteful number, since it uses less digits than its factorization.

44464581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 705800 (or 705797 counting only the distinct ones).

The product of its digits is 61440, while the sum is 36.

The square root of 44464581 is about 6668.1767373098. The cubic root of 44464581 is about 354.2730106920.

It can be divided in two parts, 444 and 64581, that added together give a square (65025 = 255²).

The spelling of 44464581 in words is "forty-four million, four hundred sixty-four thousand, five hundred eighty-one".