2129808 has 20 divisors (see below), whose sum is σ = 5502128. Its totient is φ = 709920.

The previous prime is 2129807. The next prime is 2129819. The reversal of 2129808 is 8089212.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (2129807) 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, 22138 + ... + 22233.

2^2129808 is an apocalyptic number.

It is an amenable number.

2129808 is an abundant number, since it is smaller than the sum of its proper divisors (3372320).

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

2129808 is a wasteful number, since it uses less digits than its factorization.

2129808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44382 (or 44376 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 30.

The square root of 2129808 is about 1459.3861723341. The cubic root of 2129808 is about 128.6609690206.

The spelling of 2129808 in words is "two million, one hundred twenty-nine thousand, eight hundred eight".