28728108 has 30 divisors (see below), whose sum is σ = 75101796. Its totient is φ = 9575928.

The previous prime is 28728097. The next prime is 28728121. The reversal of 28728108 is 80182782.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 44010 + ... + 44657.

Almost surely, 2^28728108 is an apocalyptic number.

It is an amenable number.

28728108 is an abundant number, since it is smaller than the sum of its proper divisors (46373688).

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

28728108 is a wasteful number, since it uses less digits than its factorization.

28728108 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88683 (or 88672 counting only the distinct ones).

The product of its (nonzero) digits is 14336, while the sum is 36.

The square root of 28728108 is about 5359.8608190885. The cubic root of 28728108 is about 306.2685071142.

The spelling of 28728108 in words is "twenty-eight million, seven hundred twenty-eight thousand, one hundred eight".