44381538 has 12 divisors (see below), whose sum is σ = 96160038. Its totient is φ = 14793840.

The previous prime is 44381531. The next prime is 44381573. The reversal of 44381538 is 83518344.

44381538 is a `hidden beast` number, since 4 + 43 + 81 + 538 = 666.

It can be written as a sum of positive squares in only one way, i.e., 27217089 + 17164449 = 5217^2 + 4143^2 .

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (44381531) 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, 1232803 + ... + 1232838.

Almost surely, 2^44381538 is an apocalyptic number.

44381538 is an abundant number, since it is smaller than the sum of its proper divisors (51778500).

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

44381538 is a wasteful number, since it uses less digits than its factorization.

44381538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2465649 (or 2465646 counting only the distinct ones).

The product of its digits is 46080, while the sum is 36.

The square root of 44381538 is about 6661.9470126983. The cubic root of 44381538 is about 354.0523239712.

The spelling of 44381538 in words is "forty-four million, three hundred eighty-one thousand, five hundred thirty-eight".