28738222 has 16 divisors (see below), whose sum is σ = 45674640. Its totient is φ = 13523328.

The previous prime is 28738207. The next prime is 28738231. The reversal of 28738222 is 22283782.

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, 3558 + ... + 8374.

It is an arithmetic number, because the mean of its divisors is an integer number (2854665).

Almost surely, 2^28738222 is an apocalyptic number.

28738222 is a deficient number, since it is larger than the sum of its proper divisors (16936418).

28738222 is a wasteful number, since it uses less digits than its factorization.

28738222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4995.

The product of its digits is 21504, while the sum is 34.

The square root of 28738222 is about 5360.8042307102. The cubic root of 28738222 is about 306.3044444645.

The spelling of 28738222 in words is "twenty-eight million, seven hundred thirty-eight thousand, two hundred twenty-two".