3640800 has 144 divisors (see below), whose sum is σ = 12467952. Its totient is φ = 921600.

The previous prime is 3640789. The next prime is 3640801. The reversal of 3640800 is 80463.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3640801) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 88780 + ... + 88820.

It is an arithmetic number, because the mean of its divisors is an integer number (86583).

Almost surely, 2^3640800 is an apocalyptic number.

3640800 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 3640800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6233976).

3640800 is an abundant number, since it is smaller than the sum of its proper divisors (8827152).

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

3640800 is a wasteful number, since it uses less digits than its factorization.

3640800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101 (or 88 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 3640800 is about 1908.0880482829. The cubic root of 3640800 is about 153.8387022032.

The spelling of 3640800 in words is "three million, six hundred forty thousand, eight hundred".