28755113 has 4 divisors (see below), whose sum is σ = 30268560. Its totient is φ = 27241668.

The previous prime is 28755091. The next prime is 28755121. The reversal of 28755113 is 31155782.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a de Polignac number, because none of the positive numbers 2^k-28755113 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 28755113.

It is not an unprimeable number, because it can be changed into a prime (28755173) by changing a digit.

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, 756695 + ... + 756732.

It is an arithmetic number, because the mean of its divisors is an integer number (7567140).

Almost surely, 2^28755113 is an apocalyptic number.

It is an amenable number.

28755113 is a deficient number, since it is larger than the sum of its proper divisors (1513447).

28755113 is a wasteful number, since it uses less digits than its factorization.

28755113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1513446.

The product of its digits is 8400, while the sum is 32.

The square root of 28755113 is about 5362.3794158937. The cubic root of 28755113 is about 306.3644432478.

The spelling of 28755113 in words is "twenty-eight million, seven hundred fifty-five thousand, one hundred thirteen".