44509640 has 48 divisors (see below), whose sum is σ = 116502300. Its totient is φ = 15259776.

The previous prime is 44509639. The next prime is 44509643. The reversal of 44509640 is 4690544.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 36747844 + 7761796 = 6062^2 + 2786^2 .

It is a super-2 number, since 2×44509640² = 3962216105859200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 44509597 and 44509606.

It is not an unprimeable number, because it can be changed into a prime (44509643) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9395 + ... + 13314.

Almost surely, 2^44509640 is an apocalyptic number.

44509640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

44509640 is an abundant number, since it is smaller than the sum of its proper divisors (71992660).

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

44509640 is a wasteful number, since it uses less digits than its factorization.

44509640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22734 (or 22723 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 32.

The square root of 44509640 is about 6671.5545414843. The cubic root of 44509640 is about 354.3926399795.

The spelling of 44509640 in words is "forty-four million, five hundred nine thousand, six hundred forty".