2640055 has 16 divisors (see below), whose sum is σ = 3608064. Its totient is φ = 1835680.

The previous prime is 2640041. The next prime is 2640059. The reversal of 2640055 is 5500462.

It is not a de Polignac number, because 2640055 - 2⁵ = 2640023 is a prime.

It is a Duffinian number.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 222 + ... + 2308.

It is an arithmetic number, because the mean of its divisors is an integer number (225504).

2^2640055 is an apocalyptic number.

2640055 is a deficient number, since it is larger than the sum of its proper divisors (968009).

2640055 is a wasteful number, since it uses less digits than its factorization.

2640055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2126.

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 2640055 is about 1624.8246059191. The cubic root of 2640055 is about 138.2094243746.

The spelling of 2640055 in words is "two million, six hundred forty thousand, fifty-five".