2690290809 has 24 divisors (see below), whose sum is σ = 3984244992. Its totient is φ = 1748249280.

The previous prime is 2690290793. The next prime is 2690290819. The reversal of 2690290809 is 9080920962.

It is not a de Polignac number, because 2690290809 - 2⁴ = 2690290793 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2690290819) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 546252 + ... + 551154.

It is an arithmetic number, because the mean of its divisors is an integer number (166010208).

Almost surely, 2^2690290809 is an apocalyptic number.

It is an amenable number.

2690290809 is a deficient number, since it is larger than the sum of its proper divisors (1293954183).

2690290809 is a wasteful number, since it uses less digits than its factorization.

2690290809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6437 (or 6434 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 45.

The square root of 2690290809 is about 51868.0133511975. The cubic root of 2690290809 is about 1390.8055315707.

It can be divided in two parts, 26902 and 90809, that added together give a palindrome (117711).

The spelling of 2690290809 in words is "two billion, six hundred ninety million, two hundred ninety thousand, eight hundred nine".