3641440 has 48 divisors (see below), whose sum is σ = 9389520. Its totient is φ = 1323520.

The previous prime is 3641437. The next prime is 3641441. The reversal of 3641440 is 441463.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3641441) 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, 726 + ... + 2794.

It is an arithmetic number, because the mean of its divisors is an integer number (195615).

Almost surely, 2^3641440 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3641440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4694760).

3641440 is an abundant number, since it is smaller than the sum of its proper divisors (5748080).

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

3641440 is a wasteful number, since it uses less digits than its factorization.

3641440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2095 (or 2087 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 3641440 is about 1908.2557480589. The cubic root of 3641440 is about 153.8477158816.

The spelling of 3641440 in words is "three million, six hundred forty-one thousand, four hundred forty".