28172254 has 16 divisors (see below), whose sum is σ = 46197360. Its totient is φ = 12778560.

The previous prime is 28172201. The next prime is 28172299. The reversal of 28172254 is 45227182.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12442 + ... + 14530.

It is an arithmetic number, because the mean of its divisors is an integer number (2887335).

Almost surely, 2^28172254 is an apocalyptic number.

28172254 is a deficient number, since it is larger than the sum of its proper divisors (18025106).

28172254 is a wasteful number, since it uses less digits than its factorization.

28172254 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2715.

The product of its digits is 8960, while the sum is 31.

The square root of 28172254 is about 5307.7541389933. The cubic root of 28172254 is about 304.2803205555.

The spelling of 28172254 in words is "twenty-eight million, one hundred seventy-two thousand, two hundred fifty-four".