28706808 has 32 divisors (see below), whose sum is σ = 77288400. Its totient is φ = 8832768.

The previous prime is 28706773. The next prime is 28706809. The reversal of 28706808 is 80860782.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28706809) 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, 45693 + ... + 46316.

Almost surely, 2^28706808 is an apocalyptic number.

It is an amenable number.

28706808 is an abundant number, since it is smaller than the sum of its proper divisors (48581592).

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

28706808 is a wasteful number, since it uses less digits than its factorization.

28706808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92031 (or 92027 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 39.

The square root of 28706808 is about 5357.8734587521. The cubic root of 28706808 is about 306.1927957573.

The spelling of 28706808 in words is "twenty-eight million, seven hundred six thousand, eight hundred eight".