44919891 has 12 divisors (see below), whose sum is σ = 64947168. Its totient is φ = 29917584.

The previous prime is 44919883. The next prime is 44919911. The reversal of 44919891 is 19891944.

It is not a de Polignac number, because 44919891 - 2³ = 44919883 is a prime.

It is not an unprimeable number, because it can be changed into a prime (44919691) 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, 11766 + ... + 15108.

It is an arithmetic number, because the mean of its divisors is an integer number (5412264).

Almost surely, 2^44919891 is an apocalyptic number.

44919891 is a deficient number, since it is larger than the sum of its proper divisors (20027277).

44919891 is a wasteful number, since it uses less digits than its factorization.

44919891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4842 (or 4839 counting only the distinct ones).

The product of its digits is 93312, while the sum is 45.

The square root of 44919891 is about 6702.2303004299. The cubic root of 44919891 is about 355.4781390297.

The spelling of 44919891 in words is "forty-four million, nine hundred nineteen thousand, eight hundred ninety-one".