3613440 has 72 divisors (see below), whose sum is σ = 11552688. Its totient is φ = 962560.

The previous prime is 3613433. The next prime is 3613447. The reversal of 3613440 is 443163.

It is an interprime number because it is at equal distance from previous prime (3613433) and next prime (3613447).

It is not an unprimeable number, because it can be changed into a prime (3613447) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3370 + ... + 4310.

It is an arithmetic number, because the mean of its divisors is an integer number (160454).

Almost surely, 2^3613440 is an apocalyptic number.

3613440 is a gapful number since it is divisible by the number (30) 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 3613440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5776344).

3613440 is an abundant number, since it is smaller than the sum of its proper divisors (7939248).

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

3613440 is an equidigital number, since it uses as much as digits as its factorization.

3613440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 965 (or 951 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 3613440 is about 1900.9050476023. The cubic root of 3613440 is about 153.4523755251.

The spelling of 3613440 in words is "three million, six hundred thirteen thousand, four hundred forty".