28758123 has 6 divisors (see below), whose sum is σ = 41539524. Its totient is φ = 19172076.

The previous prime is 28758113. The next prime is 28758137. The reversal of 28758123 is 32185782.

It is not a de Polignac number, because 28758123 - 2⁵ = 28758091 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28758113) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1597665 + ... + 1597682.

It is an arithmetic number, because the mean of its divisors is an integer number (6923254).

Almost surely, 2^28758123 is an apocalyptic number.

28758123 is a deficient number, since it is larger than the sum of its proper divisors (12781401).

28758123 is a wasteful number, since it uses less digits than its factorization.

28758123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3195353 (or 3195350 counting only the distinct ones).

The product of its digits is 26880, while the sum is 36.

The square root of 28758123 is about 5362.6600675411. The cubic root of 28758123 is about 306.3751326488.

The spelling of 28758123 in words is "twenty-eight million, seven hundred fifty-eight thousand, one hundred twenty-three".