28810808 has 32 divisors (see below), whose sum is σ = 58623600. Its totient is φ = 13195008.

The previous prime is 28810807. The next prime is 28810841. The reversal of 28810808 is 80801882.

It is a super-2 number, since 2×28810808² = 1660125315225728, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28810807) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13460 + ... + 15452.

Almost surely, 2^28810808 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28810808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29311800).

28810808 is an abundant number, since it is smaller than the sum of its proper divisors (29812792).

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

28810808 is a wasteful number, since it uses less digits than its factorization.

28810808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2151 (or 2147 counting only the distinct ones).

The product of its (nonzero) digits is 8192, while the sum is 35.

The square root of 28810808 is about 5367.5700274892. The cubic root of 28810808 is about 306.5621120153.

The spelling of 28810808 in words is "twenty-eight million, eight hundred ten thousand, eight hundred eight".