44568981 has 8 divisors (see below), whose sum is σ = 66028160. Its totient is φ = 29712636.

The previous prime is 44568973. The next prime is 44568983. The reversal of 44568981 is 18986544.

44568981 is a `hidden beast` number, since 4 + 4 + 568 + 9 + 81 = 666.

It is not a de Polignac number, because 44568981 - 2³ = 44568973 is a prime.

It is a super-2 number, since 2×44568981² = 3972788134756722, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (44568983) 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, 825325 + ... + 825378.

It is an arithmetic number, because the mean of its divisors is an integer number (8253520).

Almost surely, 2^44568981 is an apocalyptic number.

It is an amenable number.

44568981 is a deficient number, since it is larger than the sum of its proper divisors (21459179).

44568981 is a wasteful number, since it uses less digits than its factorization.

44568981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1650712 (or 1650706 counting only the distinct ones).

The product of its digits is 276480, while the sum is 45.

The square root of 44568981 is about 6676.0003744757. Note that the first 3 decimals coincide. The cubic root of 44568981 is about 354.5500641144.

The spelling of 44568981 in words is "forty-four million, five hundred sixty-eight thousand, nine hundred eighty-one".