28249908 has 24 divisors (see below), whose sum is σ = 67035360. Its totient is φ = 9256800.

The previous prime is 28249891. The next prime is 28249919. The reversal of 28249908 is 80994282.

It is a self number, because there is not a number n which added to its sum of digits gives 28249908.

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, 19243 + ... + 20658.

It is an arithmetic number, because the mean of its divisors is an integer number (2793140).

Almost surely, 2^28249908 is an apocalyptic number.

It is an amenable number.

28249908 is an abundant number, since it is smaller than the sum of its proper divisors (38785452).

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

28249908 is a wasteful number, since it uses less digits than its factorization.

28249908 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39967 (or 39965 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 42.

The square root of 28249908 is about 5315.0642517283. The cubic root of 28249908 is about 304.5596368319.

The spelling of 28249908 in words is "twenty-eight million, two hundred forty-nine thousand, nine hundred eight".