28808636 has 24 divisors (see below), whose sum is σ = 53719680. Its totient is φ = 13478832.

The previous prime is 28808623. The next prime is 28808651. The reversal of 28808636 is 63680882.

It is a junction number, because it is equal to n+sod(n) for n = 28808593 and 28808602.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4025 + ... + 8591.

It is an arithmetic number, because the mean of its divisors is an integer number (2238320).

Almost surely, 2^28808636 is an apocalyptic number.

It is an amenable number.

28808636 is a deficient number, since it is larger than the sum of its proper divisors (24911044).

28808636 is a wasteful number, since it uses less digits than its factorization.

28808636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4673 (or 4671 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 41.

The square root of 28808636 is about 5367.3676974845. The cubic root of 28808636 is about 306.5544080819.

The spelling of 28808636 in words is "twenty-eight million, eight hundred eight thousand, six hundred thirty-six".