44991438 has 16 divisors (see below), whose sum is σ = 91326720. Its totient is φ = 14773176.

The previous prime is 44991421. The next prime is 44991491. The reversal of 44991438 is 83419944.

It is a self number, because there is not a number n which added to its sum of digits gives 44991438.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55558 + ... + 56361.

It is an arithmetic number, because the mean of its divisors is an integer number (5707920).

Almost surely, 2^44991438 is an apocalyptic number.

44991438 is an abundant number, since it is smaller than the sum of its proper divisors (46335282).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

44991438 is a wasteful number, since it uses less digits than its factorization.

44991438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111991.

The product of its digits is 124416, while the sum is 42.

The square root of 44991438 is about 6707.5657283399. The cubic root of 44991438 is about 355.6667704104. Note that the first 3 decimals are identical.

The spelling of 44991438 in words is "forty-four million, nine hundred ninety-one thousand, four hundred thirty-eight".