44945991 has 6 divisors (see below), whose sum is σ = 64922000. Its totient is φ = 29963988.

The previous prime is 44945987. The next prime is 44945993. The reversal of 44945991 is 19954944.

It is not a de Polignac number, because 44945991 - 2² = 44945987 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (44945993) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2496991 + ... + 2497008.

Almost surely, 2^44945991 is an apocalyptic number.

44945991 is a deficient number, since it is larger than the sum of its proper divisors (19976009).

44945991 is a wasteful number, since it uses less digits than its factorization.

44945991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4994005 (or 4994002 counting only the distinct ones).

The product of its digits is 233280, while the sum is 45.

The square root of 44945991 is about 6704.1771307149. The cubic root of 44945991 is about 355.5469740370.

The spelling of 44945991 in words is "forty-four million, nine hundred forty-five thousand, nine hundred ninety-one".