44287640 has 64 divisors (see below), whose sum is σ = 104695200. Its totient is φ = 16837632.

The previous prime is 44287609. The next prime is 44287679. The reversal of 44287640 is 4678244.

It is a super-2 number, since 2×44287640² = 3922790113539200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 44287640.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 84419 + ... + 84941.

Almost surely, 2^44287640 is an apocalyptic number.

44287640 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 44287640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (52347600).

44287640 is an abundant number, since it is smaller than the sum of its proper divisors (60407560).

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

44287640 is a wasteful number, since it uses less digits than its factorization.

44287640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 636 (or 632 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 35.

The square root of 44287640 is about 6654.8959420865. The cubic root of 44287640 is about 353.8024582271.

The spelling of 44287640 in words is "forty-four million, two hundred eighty-seven thousand, six hundred forty".