3640806 has 24 divisors (see below), whose sum is σ = 8495760. Its totient is φ = 1120176.

The previous prime is 3640801. The next prime is 3640807. The reversal of 3640806 is 6080463.

It is a self number, because there is not a number n which added to its sum of digits gives 3640806.

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 11 ways as a sum of consecutive naturals, for example, 7546 + ... + 8013.

It is an arithmetic number, because the mean of its divisors is an integer number (353990).

Almost surely, 2^3640806 is an apocalyptic number.

3640806 is an abundant number, since it is smaller than the sum of its proper divisors (4854954).

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

3640806 is a wasteful number, since it uses less digits than its factorization.

3640806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15580 (or 15577 counting only the distinct ones).

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

The square root of 3640806 is about 1908.0896205367. The cubic root of 3640806 is about 153.8387867113.

The spelling of 3640806 in words is "three million, six hundred forty thousand, eight hundred six".