44491840 has 56 divisors (see below), whose sum is σ = 106555032. Its totient is φ = 17694720.

The previous prime is 44491807. The next prime is 44491883. The reversal of 44491840 is 4819444.

It can be written as a sum of positive squares in 4 ways, for example, as 14197824 + 30294016 = 3768^2 + 5504^2 .

It is a junction number, because it is equal to n+sod(n) for n = 44491796 and 44491805.

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, 81970 + ... + 82510.

Almost surely, 2^44491840 is an apocalyptic number.

44491840 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 44491840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (53277516).

44491840 is an abundant number, since it is smaller than the sum of its proper divisors (62063192).

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

44491840 is a wasteful number, since it uses less digits than its factorization.

44491840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 815 (or 805 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 34.

The square root of 44491840 is about 6670.2203861642. The cubic root of 44491840 is about 354.3453915625.

The spelling of 44491840 in words is "forty-four million, four hundred ninety-one thousand, eight hundred forty".