28121159 has 16 divisors (see below), whose sum is σ = 32503680. Its totient is φ = 24060960.

The previous prime is 28121143. The next prime is 28121161. The reversal of 28121159 is 95112182.

It is not a de Polignac number, because 28121159 - 2⁴ = 28121143 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28121129) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40832 + ... + 41514.

It is an arithmetic number, because the mean of its divisors is an integer number (2031480).

Almost surely, 2^28121159 is an apocalyptic number.

28121159 is a deficient number, since it is larger than the sum of its proper divisors (4382521).

28121159 is a wasteful number, since it uses less digits than its factorization.

28121159 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 910.

The product of its digits is 1440, while the sum is 29.

The square root of 28121159 is about 5302.9387135814. The cubic root of 28121159 is about 304.0962551556.

The spelling of 28121159 in words is "twenty-eight million, one hundred twenty-one thousand, one hundred fifty-nine".