28753739 has 6 divisors (see below), whose sum is σ = 33448284. Its totient is φ = 24646020.

The previous prime is 28753729. The next prime is 28753757. The reversal of 28753739 is 93735782.

It is a de Polignac number, because none of the positive numbers 2^k-28753739 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28753739.

It is not an unprimeable number, because it can be changed into a prime (28753729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 293357 + ... + 293454.

It is an arithmetic number, because the mean of its divisors is an integer number (5574714).

Almost surely, 2^28753739 is an apocalyptic number.

28753739 is a deficient number, since it is larger than the sum of its proper divisors (4694545).

28753739 is an equidigital number, since it uses as much as digits as its factorization.

28753739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 586825 (or 586818 counting only the distinct ones).

The product of its digits is 317520, while the sum is 44.

The square root of 28753739 is about 5362.2512995942. The cubic root of 28753739 is about 306.3595635191.

It can be divided in two parts, 28753 and 739, that added together give a palindrome (29492).

The spelling of 28753739 in words is "twenty-eight million, seven hundred fifty-three thousand, seven hundred thirty-nine".