44181918 has 48 divisors (see below), whose sum is σ = 104996736. Its totient is φ = 13315920.

The previous prime is 44181899. The next prime is 44181931. The reversal of 44181918 is 81918144.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 44455 + ... + 45437.

It is an arithmetic number, because the mean of its divisors is an integer number (2187432).

Almost surely, 2^44181918 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 44181918, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (52498368).

44181918 is an abundant number, since it is smaller than the sum of its proper divisors (60814818).

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

44181918 is a wasteful number, since it uses less digits than its factorization.

44181918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1229 (or 1226 counting only the distinct ones).

The product of its digits is 9216, while the sum is 36.

The square root of 44181918 is about 6646.9480214607. The cubic root of 44181918 is about 353.5207053739.

It can be divided in two parts, 4418 and 1918, that added together give a palindrome (6336).

The spelling of 44181918 in words is "forty-four million, one hundred eighty-one thousand, nine hundred eighteen".