3640456 has 16 divisors (see below), whose sum is σ = 6903900. Its totient is φ = 1799424.

The previous prime is 3640451. The next prime is 3640471. The reversal of 3640456 is 6540463.

It can be written as a sum of positive squares in 2 ways, for example, as 2775556 + 864900 = 1666^2 + 930^2 .

It is not an unprimeable number, because it can be changed into a prime (3640451) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1845 + ... + 3268.

Almost surely, 2^3640456 is an apocalyptic number.

It is an amenable number.

3640456 is a deficient number, since it is larger than the sum of its proper divisors (3263444).

3640456 is a wasteful number, since it uses less digits than its factorization.

3640456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5208 (or 5204 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 28.

The square root of 3640456 is about 1907.9979035628. The cubic root of 3640456 is about 153.8338569146.

It can be divided in two parts, 3640 and 456, that added together give a 12-th power (4096 = 2¹²).

The spelling of 3640456 in words is "three million, six hundred forty thousand, four hundred fifty-six".