28239124 has 12 divisors (see below), whose sum is σ = 51567264. Its totient is φ = 13505624.

The previous prime is 28239083. The next prime is 28239131. The reversal of 28239124 is 42193282.

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 3 ways as a sum of consecutive naturals, for example, 153382 + ... + 153565.

It is an arithmetic number, because the mean of its divisors is an integer number (4297272).

Almost surely, 2^28239124 is an apocalyptic number.

It is an amenable number.

28239124 is a deficient number, since it is larger than the sum of its proper divisors (23328140).

28239124 is a wasteful number, since it uses less digits than its factorization.

28239124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 306974 (or 306972 counting only the distinct ones).

The product of its digits is 6912, while the sum is 31.

The square root of 28239124 is about 5314.0496798581. The cubic root of 28239124 is about 304.5208781318.

The spelling of 28239124 in words is "twenty-eight million, two hundred thirty-nine thousand, one hundred twenty-four".