44913981 has 16 divisors (see below), whose sum is σ = 68534784. Its totient is φ = 25629744.

The previous prime is 44913977. The next prime is 44914003. The reversal of 44913981 is 18931944.

It is not a de Polignac number, because 44913981 - 2² = 44913977 is a prime.

It is a super-2 number, since 2×44913981² = 4034531378536722, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (44913581) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26110 + ... + 27776.

It is an arithmetic number, because the mean of its divisors is an integer number (4283424).

Almost surely, 2^44913981 is an apocalyptic number.

It is an amenable number.

44913981 is a deficient number, since it is larger than the sum of its proper divisors (23620803).

44913981 is a wasteful number, since it uses less digits than its factorization.

44913981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2960.

The product of its digits is 31104, while the sum is 39.

The square root of 44913981 is about 6701.7893879172. The cubic root of 44913981 is about 355.4625485500.

The spelling of 44913981 in words is "forty-four million, nine hundred thirteen thousand, nine hundred eighty-one".