28753839 has 8 divisors (see below), whose sum is σ = 42598320. Its totient is φ = 19169208.

The previous prime is 28753759. The next prime is 28753849. The reversal of 28753839 is 93835782.

28753839 is a `hidden beast` number, since 2 + 87 + 538 + 39 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-28753839 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28753794 and 28753803.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28753849) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 532452 + ... + 532505.

It is an arithmetic number, because the mean of its divisors is an integer number (5324790).

Almost surely, 2^28753839 is an apocalyptic number.

28753839 is a deficient number, since it is larger than the sum of its proper divisors (13844481).

28753839 is a wasteful number, since it uses less digits than its factorization.

28753839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1064966 (or 1064960 counting only the distinct ones).

The product of its digits is 362880, while the sum is 45.

The square root of 28753839 is about 5362.2606240279. The cubic root of 28753839 is about 306.3599186720.

It can be divided in two parts, 28753 and 839, that added together give a palindrome (29592).

The spelling of 28753839 in words is "twenty-eight million, seven hundred fifty-three thousand, eight hundred thirty-nine".