28164722 has 8 divisors (see below), whose sum is σ = 42756336. Its totient is φ = 13912612.

The previous prime is 28164691. The next prime is 28164749. The reversal of 28164722 is 22746182.

It is a sphenic number, since it is the product of 3 distinct primes.

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 3 ways as a sum of consecutive naturals, for example, 84668 + ... + 84999.

It is an arithmetic number, because the mean of its divisors is an integer number (5344542).

Almost surely, 2^28164722 is an apocalyptic number.

28164722 is a deficient number, since it is larger than the sum of its proper divisors (14591614).

28164722 is a wasteful number, since it uses less digits than its factorization.

28164722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169752.

The product of its digits is 10752, while the sum is 32.

The square root of 28164722 is about 5307.0445635966. The cubic root of 28164722 is about 304.2532011581.

The spelling of 28164722 in words is "twenty-eight million, one hundred sixty-four thousand, seven hundred twenty-two".