2609844990 has 16 divisors (see below), whose sum is σ = 6263628048. Its totient is φ = 695958656.

The previous prime is 2609844977. The next prime is 2609845057. The reversal of 2609844990 is 994489062.

It is a happy number.

It is a super-2 number, since 2×2609844990² = 13622581743656200200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43497387 + ... + 43497446.

It is an arithmetic number, because the mean of its divisors is an integer number (391476753).

Almost surely, 2^2609844990 is an apocalyptic number.

2609844990 is an abundant number, since it is smaller than the sum of its proper divisors (3653783058).

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

2609844990 is a wasteful number, since it uses less digits than its factorization.

2609844990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86994843.

The product of its (nonzero) digits is 1119744, while the sum is 51.

The square root of 2609844990 is about 51086.6419918162. The cubic root of 2609844990 is about 1376.8022630116.

The spelling of 2609844990 in words is "two billion, six hundred nine million, eight hundred forty-four thousand, nine hundred ninety".