28653839 has 2 divisors, whose sum is σ = 28653840. Its totient is φ = 28653838.

The previous prime is 28653829. The next prime is 28653871. The reversal of 28653839 is 93835682.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28653839 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28653839.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28653809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14326919 + 14326920.

It is an arithmetic number, because the mean of its divisors is an integer number (14326920).

Almost surely, 2^28653839 is an apocalyptic number.

28653839 is a deficient number, since it is larger than the sum of its proper divisors (1).

28653839 is an equidigital number, since it uses as much as digits as its factorization.

28653839 is an evil number, because the sum of its binary digits is even.

The product of its digits is 311040, while the sum is 44.

The square root of 28653839 is about 5352.9280772303. The cubic root of 28653839 is about 306.0043536766.

It can be divided in two parts, 28653 and 839, that added together give a palindrome (29492).

The spelling of 28653839 in words is "twenty-eight million, six hundred fifty-three thousand, eight hundred thirty-nine".