28759239 has 32 divisors (see below), whose sum is σ = 43904000. Its totient is φ = 18600192.

The previous prime is 28759219. The next prime is 28759273. The reversal of 28759239 is 93295782.

28759239 is a `hidden beast` number, since 28 + 7 + 592 + 39 = 666.

It is not a de Polignac number, because 28759239 - 2⁵ = 28759207 is a prime.

It is a Duffinian number.

Its product of digits (272160) is a multiple of the sum of its prime factors (324).

It is a junction number, because it is equal to n+sod(n) for n = 28759194 and 28759203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28759219) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 206832 + ... + 206970.

It is an arithmetic number, because the mean of its divisors is an integer number (1372000).

Almost surely, 2^28759239 is an apocalyptic number.

28759239 is a deficient number, since it is larger than the sum of its proper divisors (15144761).

28759239 is a wasteful number, since it uses less digits than its factorization.

28759239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 324 (or 318 counting only the distinct ones).

The product of its digits is 272160, while the sum is 45.

The square root of 28759239 is about 5362.7641193698. The cubic root of 28759239 is about 306.3790957056.

The spelling of 28759239 in words is "twenty-eight million, seven hundred fifty-nine thousand, two hundred thirty-nine".