2639812 has 24 divisors (see below), whose sum is σ = 5463360. Its totient is φ = 1092000.

The previous prime is 2639809. The next prime is 2639827. The reversal of 2639812 is 2189362.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 814 + ... + 2437.

It is an arithmetic number, because the mean of its divisors is an integer number (227640).

2^2639812 is an apocalyptic number.

It is an amenable number.

2639812 is an abundant number, since it is smaller than the sum of its proper divisors (2823548).

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

2639812 is a wasteful number, since it uses less digits than its factorization.

2639812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3291 (or 3289 counting only the distinct ones).

The product of its digits is 5184, while the sum is 31.

The square root of 2639812 is about 1624.7498268964. The cubic root of 2639812 is about 138.2051838164.

The spelling of 2639812 in words is "two million, six hundred thirty-nine thousand, eight hundred twelve".