28508118 has 16 divisors (see below), whose sum is σ = 57160560. Its totient is φ = 9478656.

The previous prime is 28508107. The next prime is 28508141. The reversal of 28508118 is 81180582.

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, 3355 + ... + 8262.

It is an arithmetic number, because the mean of its divisors is an integer number (3572535).

Almost surely, 2^28508118 is an apocalyptic number.

28508118 is an abundant number, since it is smaller than the sum of its proper divisors (28652442).

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

28508118 is a wasteful number, since it uses less digits than its factorization.

28508118 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12031.

The product of its (nonzero) digits is 5120, while the sum is 33.

The square root of 28508118 is about 5339.2993922424. The cubic root of 28508118 is about 305.4847366796.

The spelling of 28508118 in words is "twenty-eight million, five hundred eight thousand, one hundred eighteen".