44891987 has 12 divisors (see below), whose sum is σ = 52886880. Its totient is φ = 37988496.

The previous prime is 44891983. The next prime is 44892037. The reversal of 44891987 is 78919844.

It is not a de Polignac number, because 44891987 - 2² = 44891983 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (44891983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1928 + ... + 9669.

It is an arithmetic number, because the mean of its divisors is an integer number (4407240).

Almost surely, 2^44891987 is an apocalyptic number.

44891987 is a deficient number, since it is larger than the sum of its proper divisors (7994893).

44891987 is a wasteful number, since it uses less digits than its factorization.

44891987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11690 (or 11683 counting only the distinct ones).

The product of its digits is 580608, while the sum is 50.

The square root of 44891987 is about 6700.1482819412. The cubic root of 44891987 is about 355.4045167330.

The spelling of 44891987 in words is "forty-four million, eight hundred ninety-one thousand, nine hundred eighty-seven".