28172366 has 16 divisors (see below), whose sum is σ = 46189440. Its totient is φ = 12829440.

The previous prime is 28172359. The next prime is 28172377. The reversal of 28172366 is 66327182.

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 (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12311 + ... + 14418.

It is an arithmetic number, because the mean of its divisors is an integer number (2886840).

Almost surely, 2^28172366 is an apocalyptic number.

28172366 is a deficient number, since it is larger than the sum of its proper divisors (18017074).

28172366 is a wasteful number, since it uses less digits than its factorization.

28172366 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26779.

The product of its digits is 24192, while the sum is 35.

The square root of 28172366 is about 5307.7646895845. The cubic root of 28172366 is about 304.2807237814.

The spelling of 28172366 in words is "twenty-eight million, one hundred seventy-two thousand, three hundred sixty-six".