2909890206 has 24 divisors (see below), whose sum is σ = 6508142784. Its totient is φ = 938674080.

The previous prime is 2909890177. The next prime is 2909890219. The reversal of 2909890206 is 6020989092.

It is a super-2 number, since 2×2909890206² = 16934922021949444872, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2606871 + ... + 2607986.

It is an arithmetic number, because the mean of its divisors is an integer number (271172616).

Almost surely, 2^2909890206 is an apocalyptic number.

2909890206 is an abundant number, since it is smaller than the sum of its proper divisors (3598252578).

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

2909890206 is a wasteful number, since it uses less digits than its factorization.

2909890206 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5214896 (or 5214893 counting only the distinct ones).

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

The square root of 2909890206 is about 53943.3981688214. The cubic root of 2909890206 is about 1427.6624411029.

The spelling of 2909890206 in words is "two billion, nine hundred nine million, eight hundred ninety thousand, two hundred six".