4440640 has 28 divisors (see below), whose sum is σ = 10575036. Its totient is φ = 1776128.

The previous prime is 4440637. The next prime is 4440641. The reversal of 4440640 is 460444.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 876096 + 3564544 = 936^2 + 1888^2 .

It is not an unprimeable number, because it can be changed into a prime (4440641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6619 + ... + 7258.

Almost surely, 2^4440640 is an apocalyptic number.

4440640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

4440640 is an abundant number, since it is smaller than the sum of its proper divisors (6134396).

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

4440640 is a wasteful number, since it uses less digits than its factorization.

4440640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13894 (or 13884 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 22.

The square root of 4440640 is about 2107.2826103776. The cubic root of 4440640 is about 164.3672120624.

The spelling of 4440640 in words is "four million, four hundred forty thousand, six hundred forty".