2640099 has 24 divisors (see below), whose sum is σ = 4426240. Its totient is φ = 1370160.

The previous prime is 2640067. The next prime is 2640137. The reversal of 2640099 is 9900462.

It is not a de Polignac number, because 2640099 - 2⁵ = 2640067 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2640059) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2022 + ... + 3060.

2^2640099 is an apocalyptic number.

2640099 is a deficient number, since it is larger than the sum of its proper divisors (1786141).

2640099 is a wasteful number, since it uses less digits than its factorization.

2640099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1071 (or 1060 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 30.

The square root of 2640099 is about 1624.8381457856. The cubic root of 2640099 is about 138.2101921844.

The spelling of 2640099 in words is "two million, six hundred forty thousand, ninety-nine".