28108892 has 12 divisors (see below), whose sum is σ = 56217840. Its totient is φ = 12046656.

The previous prime is 28108889. The next prime is 28108919. The reversal of 28108892 is 29880182.

28108892 is an admirable number.

It is a super-3 number, since 3×28108892³ (a number of 23 digits) contains 333 as substring.

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 501917 + ... + 501972.

It is an arithmetic number, because the mean of its divisors is an integer number (4684820).

Almost surely, 2^28108892 is an apocalyptic number.

It is an amenable number.

28108892 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

28108892 is a wasteful number, since it uses less digits than its factorization.

28108892 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1003900 (or 1003898 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 38.

The square root of 28108892 is about 5301.7819645851. The cubic root of 28108892 is about 304.0520311449.

The spelling of 28108892 in words is "twenty-eight million, one hundred eight thousand, eight hundred ninety-two".