2640364 has 12 divisors (see below), whose sum is σ = 4639264. Its totient is φ = 1314864.

The previous prime is 2640361. The next prime is 2640367. The reversal of 2640364 is 4630462.

It is an interprime number because it is at equal distance from previous prime (2640361) and next prime (2640367).

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (2640361) 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, 84 + ... + 2299.

2^2640364 is an apocalyptic number.

It is an amenable number.

2640364 is a deficient number, since it is larger than the sum of its proper divisors (1998900).

2640364 is a wasteful number, since it uses less digits than its factorization.

2640364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2664 (or 2662 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 25.

The square root of 2640364 is about 1624.9196903232. The cubic root of 2640364 is about 138.2148163135.

The spelling of 2640364 in words is "two million, six hundred forty thousand, three hundred sixty-four".