2639900 has 18 divisors (see below), whose sum is σ = 5728800. Its totient is φ = 1055920.

The previous prime is 2639891. The next prime is 2639911. The reversal of 2639900 is 99362.

2639900 = T₄₄₇ + T₄₄₈ + ... + T₄₇₁.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13100 + ... + 13299.

2^2639900 is an apocalyptic number.

2639900 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2639900 is an abundant number, since it is smaller than the sum of its proper divisors (3088900).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2639900 is a wasteful number, since it uses less digits than its factorization.

2639900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26413 (or 26406 counting only the distinct ones).

The product of its (nonzero) digits is 2916, while the sum is 29.

The square root of 2639900 is about 1624.7769077630. The cubic root of 2639900 is about 138.2067195218.

The spelling of 2639900 in words is "two million, six hundred thirty-nine thousand, nine hundred".