44138961 has 12 divisors (see below), whose sum is σ = 64180480. Its totient is φ = 29230200.

The previous prime is 44138923. The next prime is 44138989. The reversal of 44138961 is 16983144.

It is not a de Polignac number, because 44138961 - 2⁷ = 44138833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (44138911) 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, 14881 + ... + 17598.

Almost surely, 2^44138961 is an apocalyptic number.

It is an amenable number.

44138961 is a deficient number, since it is larger than the sum of its proper divisors (20041519).

44138961 is a wasteful number, since it uses less digits than its factorization.

44138961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32636 (or 32633 counting only the distinct ones).

The product of its digits is 20736, while the sum is 36.

The square root of 44138961 is about 6643.7159030169. The cubic root of 44138961 is about 353.4060950385.

The spelling of 44138961 in words is "forty-four million, one hundred thirty-eight thousand, nine hundred sixty-one".