44420981 has 16 divisors (see below), whose sum is σ = 50813568. Its totient is φ = 38438400.

The previous prime is 44420951. The next prime is 44421001. The reversal of 44420981 is 18902444.

It is not a de Polignac number, because 44420981 - 2¹⁸ = 44158837 is a prime.

It is a super-4 number, since 4×44420981⁴ (a number of 32 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (44420941) 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, 85001 + ... + 85521.

It is an arithmetic number, because the mean of its divisors is an integer number (3175848).

Almost surely, 2^44420981 is an apocalyptic number.

It is an amenable number.

44420981 is a deficient number, since it is larger than the sum of its proper divisors (6392587).

44420981 is a wasteful number, since it uses less digits than its factorization.

44420981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 892.

The product of its (nonzero) digits is 9216, while the sum is 32.

The square root of 44420981 is about 6664.9066760158. The cubic root of 44420981 is about 354.1571780126.

The spelling of 44420981 in words is "forty-four million, four hundred twenty thousand, nine hundred eighty-one".