28688158 has 16 divisors (see below), whose sum is σ = 44065296. Its totient is φ = 14002560.

The previous prime is 28688123. The next prime is 28688167. The reversal of 28688158 is 85188682.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24985 + ... + 26107.

It is an arithmetic number, because the mean of its divisors is an integer number (2754081).

Almost surely, 2^28688158 is an apocalyptic number.

28688158 is a deficient number, since it is larger than the sum of its proper divisors (15377138).

28688158 is a wasteful number, since it uses less digits than its factorization.

28688158 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1419.

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

The square root of 28688158 is about 5356.1327466746. The cubic root of 28688158 is about 306.1264731305.

It can be divided in two parts, 2868 and 8158, that added together give a triangular number (11026 = T₁₄₈).

The spelling of 28688158 in words is "twenty-eight million, six hundred eighty-eight thousand, one hundred fifty-eight".