3640740 has 24 divisors (see below), whose sum is σ = 10194240. Its totient is φ = 970848.

The previous prime is 3640717. The next prime is 3640753. The reversal of 3640740 is 470463.

It is a self number, because there is not a number n which added to its sum of digits gives 3640740.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30280 + ... + 30399.

It is an arithmetic number, because the mean of its divisors is an integer number (424760).

Almost surely, 2^3640740 is an apocalyptic number.

3640740 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3640740 is an abundant number, since it is smaller than the sum of its proper divisors (6553500).

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

3640740 is a wasteful number, since it uses less digits than its factorization.

3640740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60691 (or 60689 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 24.

The square root of 3640740 is about 1908.0723256732. The cubic root of 3640740 is about 153.8378571167.

The spelling of 3640740 in words is "three million, six hundred forty thousand, seven hundred forty".