28158886 has 16 divisors (see below), whose sum is σ = 48354336. Its totient is φ = 12047616.

The previous prime is 28158859. The next prime is 28158917. The reversal of 28158886 is 68885182.

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, 9270 + ... + 11926.

It is an arithmetic number, because the mean of its divisors is an integer number (3022146).

Almost surely, 2^28158886 is an apocalyptic number.

28158886 is a deficient number, since it is larger than the sum of its proper divisors (20195450).

28158886 is a wasteful number, since it uses less digits than its factorization.

28158886 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3423.

The product of its digits is 245760, while the sum is 46.

The square root of 28158886 is about 5306.4946998937. The cubic root of 28158886 is about 304.2321849813.

The spelling of 28158886 in words is "twenty-eight million, one hundred fifty-eight thousand, eight hundred eighty-six".