28112745 has 16 divisors (see below), whose sum is σ = 46532160. Its totient is φ = 14476224.

The previous prime is 28112743. The next prime is 28112759. The reversal of 28112745 is 54721182.

28112745 is nontrivially palindromic in base 12.

It is not a de Polignac number, because 28112745 - 2¹ = 28112743 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28112741) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31879 + ... + 32748.

It is an arithmetic number, because the mean of its divisors is an integer number (2908260).

Almost surely, 2^28112745 is an apocalyptic number.

It is an amenable number.

28112745 is a deficient number, since it is larger than the sum of its proper divisors (18419415).

28112745 is a wasteful number, since it uses less digits than its factorization.

28112745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64664.

The product of its digits is 4480, while the sum is 30.

The square root of 28112745 is about 5302.1453205283. The cubic root of 28112745 is about 304.0659230591.

The spelling of 28112745 in words is "twenty-eight million, one hundred twelve thousand, seven hundred forty-five".