2640915 has 12 divisors (see below), whose sum is σ = 4577664. Its totient is φ = 1408464.

The previous prime is 2640907. The next prime is 2640917. The reversal of 2640915 is 5190462.

2640915 is a `hidden beast` number, since 2 + 640 + 9 + 15 = 666.

It is not a de Polignac number, because 2640915 - 2³ = 2640907 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2640917) 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, 29299 + ... + 29388.

It is an arithmetic number, because the mean of its divisors is an integer number (381472).

2^2640915 is an apocalyptic number.

2640915 is a deficient number, since it is larger than the sum of its proper divisors (1936749).

2640915 is a wasteful number, since it uses less digits than its factorization.

2640915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58698 (or 58695 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 2640915 is about 1625.0892283195. The cubic root of 2640915 is about 138.2244300217.

The spelling of 2640915 in words is "two million, six hundred forty thousand, nine hundred fifteen".