28123254 has 32 divisors (see below), whose sum is σ = 62784480. Its totient is φ = 9331200.

The previous prime is 28123241. The next prime is 28123283. The reversal of 28123254 is 45232182.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11934 + ... + 14094.

It is an arithmetic number, because the mean of its divisors is an integer number (1962015).

Almost surely, 2^28123254 is an apocalyptic number.

28123254 is an abundant number, since it is smaller than the sum of its proper divisors (34661226).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28123254 is a wasteful number, since it uses less digits than its factorization.

28123254 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2413 (or 2407 counting only the distinct ones).

The product of its digits is 3840, while the sum is 27.

The square root of 28123254 is about 5303.1362418856. The cubic root of 28123254 is about 304.1038065968.

It can be divided in two parts, 2812325 and 4, that added together give a square (2812329 = 1677²).

The spelling of 28123254 in words is "twenty-eight million, one hundred twenty-three thousand, two hundred fifty-four".