28751123 has 12 divisors (see below), whose sum is σ = 30787848. Its totient is φ = 26840160.

The previous prime is 28751119. The next prime is 28751141. The reversal of 28751123 is 32115782.

It is not a de Polignac number, because 28751123 - 2² = 28751119 is a prime.

It is a super-2 number, since 2×28751123² = 1653254147522258, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28751153) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 25808 + ... + 26898.

It is an arithmetic number, because the mean of its divisors is an integer number (2565654).

Almost surely, 2^28751123 is an apocalyptic number.

28751123 is a deficient number, since it is larger than the sum of its proper divisors (2036725).

28751123 is a wasteful number, since it uses less digits than its factorization.

28751123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1202 (or 1183 counting only the distinct ones).

The product of its digits is 3360, while the sum is 29.

The square root of 28751123 is about 5362.0073666492. The cubic root of 28751123 is about 306.3502724269.

The spelling of 28751123 in words is "twenty-eight million, seven hundred fifty-one thousand, one hundred twenty-three".