4409640 has 80 divisors (see below), whose sum is σ = 14832180. Its totient is φ = 1175040.

The previous prime is 4409633. The next prime is 4409651. The reversal of 4409640 is 469044.

It can be written as a sum of positive squares in 2 ways, for example, as 4137156 + 272484 = 2034^2 + 522^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 2560 + ... + 3920.

Almost surely, 2^4409640 is an apocalyptic number.

4409640 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 4409640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7416090).

4409640 is an abundant number, since it is smaller than the sum of its proper divisors (10422540).

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

4409640 is a wasteful number, since it uses less digits than its factorization.

4409640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1384 (or 1371 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 4409640 is about 2099.9142839649. The cubic root of 4409640 is about 163.9838373919.

The spelling of 4409640 in words is "four million, four hundred nine thousand, six hundred forty".