2508639 has 16 divisors (see below), whose sum is σ = 4048128. Its totient is φ = 1348992.

The previous prime is 2508629. The next prime is 2508641. The reversal of 2508639 is 9368052.

It is a happy number.

It is not a de Polignac number, because 2508639 - 2⁷ = 2508511 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2508619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3157 + ... + 3870.

It is an arithmetic number, because the mean of its divisors is an integer number (253008).

2^2508639 is an apocalyptic number.

2508639 is a deficient number, since it is larger than the sum of its proper divisors (1539489).

2508639 is a wasteful number, since it uses less digits than its factorization.

2508639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7054.

The product of its (nonzero) digits is 12960, while the sum is 33.

The square root of 2508639 is about 1583.8683657426. The cubic root of 2508639 is about 135.8770334592.

The spelling of 2508639 in words is "two million, five hundred eight thousand, six hundred thirty-nine".