28159124 has 18 divisors (see below), whose sum is σ = 57324330. Its totient is φ = 12068112.

The previous prime is 28159111. The next prime is 28159139. The reversal of 28159124 is 42195182.

It can be written as a sum of positive squares in only one way, i.e., 17056900 + 11102224 = 4130^2 + 3332^2 .

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 5 ways as a sum of consecutive naturals, for example, 71639 + ... + 72030.

It is an arithmetic number, because the mean of its divisors is an integer number (3184685).

Almost surely, 2^28159124 is an apocalyptic number.

It is an amenable number.

28159124 is an abundant number, since it is smaller than the sum of its proper divisors (29165206).

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

28159124 is a wasteful number, since it uses less digits than its factorization.

28159124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143687 (or 143678 counting only the distinct ones).

The product of its digits is 5760, while the sum is 32.

The square root of 28159124 is about 5306.5171251961. The cubic root of 28159124 is about 304.2330421063.

The spelling of 28159124 in words is "twenty-eight million, one hundred fifty-nine thousand, one hundred twenty-four".