28098864 has 30 divisors (see below), whose sum is σ = 78638196. Its totient is φ = 9366240.

The previous prime is 28098859. The next prime is 28098871. The reversal of 28098864 is 46889082.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 97422 + ... + 97709.

Almost surely, 2^28098864 is an apocalyptic number.

28098864 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

28098864 is an abundant number, since it is smaller than the sum of its proper divisors (50539332).

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

28098864 is a wasteful number, since it uses less digits than its factorization.

28098864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195145 (or 195136 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 45.

The square root of 28098864 is about 5300.8361604562. The cubic root of 28098864 is about 304.0158694393.

The spelling of 28098864 in words is "twenty-eight million, ninety-eight thousand, eight hundred sixty-four".