2640957 has 16 divisors (see below), whose sum is σ = 3870720. Its totient is φ = 1588400.

The previous prime is 2640947. The next prime is 2640959. The reversal of 2640957 is 7590462.

It is not a de Polignac number, because 2640957 - 2⁴ = 2640941 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2640959) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6094 + ... + 6512.

It is an arithmetic number, because the mean of its divisors is an integer number (241920).

2^2640957 is an apocalyptic number.

It is an amenable number.

2640957 is a deficient number, since it is larger than the sum of its proper divisors (1229763).

2640957 is a wasteful number, since it uses less digits than its factorization.

2640957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 624.

The product of its (nonzero) digits is 15120, while the sum is 33.

The square root of 2640957 is about 1625.1021506355. The cubic root of 2640957 is about 138.2251627722.

The spelling of 2640957 in words is "two million, six hundred forty thousand, nine hundred fifty-seven".