44481891 has 4 divisors (see below), whose sum is σ = 59309192. Its totient is φ = 29654592.

The previous prime is 44481887. The next prime is 44481901. The reversal of 44481891 is 19818444.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 44481891 - 2² = 44481887 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (44481191) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7413646 + ... + 7413651.

It is an arithmetic number, because the mean of its divisors is an integer number (14827298).

Almost surely, 2^44481891 is an apocalyptic number.

44481891 is a deficient number, since it is larger than the sum of its proper divisors (14827301).

44481891 is a wasteful number, since it uses less digits than its factorization.

44481891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14827300.

The product of its digits is 36864, while the sum is 39.

The square root of 44481891 is about 6669.4745670105. The cubic root of 44481891 is about 354.3189773923.

The spelling of 44481891 in words is "forty-four million, four hundred eighty-one thousand, eight hundred ninety-one".