28198886 has 12 divisors (see below), whose sum is σ = 44933748. Its totient is φ = 13269792.

The previous prime is 28198853. The next prime is 28198931. The reversal of 28198886 is 68889182.

It is a congruent 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, 23816 + ... + 24971.

It is an arithmetic number, because the mean of its divisors is an integer number (3744479).

Almost surely, 2^28198886 is an apocalyptic number.

28198886 is a deficient number, since it is larger than the sum of its proper divisors (16734862).

28198886 is a wasteful number, since it uses less digits than its factorization.

28198886 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48823 (or 48806 counting only the distinct ones).

The product of its digits is 442368, while the sum is 50.

The square root of 28198886 is about 5310.2623287367. The cubic root of 28198886 is about 304.3761718532.

The spelling of 28198886 in words is "twenty-eight million, one hundred ninety-eight thousand, eight hundred eighty-six".