2108985808 has 20 divisors (see below), whose sum is σ = 4088809728. Its totient is φ = 1053809120.

The previous prime is 2108985803. The next prime is 2108985859. The reversal of 2108985808 is 8085898012.

It is a happy number.

It is a super-2 number, since 2×2108985808² = 8895642276690825728, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2108985803) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16816 + ... + 67087.

Almost surely, 2^2108985808 is an apocalyptic number.

It is an amenable number.

2108985808 is a deficient number, since it is larger than the sum of its proper divisors (1979823920).

2108985808 is a wasteful number, since it uses less digits than its factorization.

2108985808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85482 (or 85476 counting only the distinct ones).

The product of its (nonzero) digits is 368640, while the sum is 49.

The square root of 2108985808 is about 45923.6954958984. The cubic root of 2108985808 is about 1282.4030800202.

The spelling of 2108985808 in words is "two billion, one hundred eight million, nine hundred eighty-five thousand, eight hundred eight".