28135222 has 16 divisors (see below), whose sum is σ = 43204752. Its totient is φ = 13737600.

The previous prime is 28135193. The next prime is 28135231. The reversal of 28135222 is 22253182.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14722 + ... + 16522.

It is an arithmetic number, because the mean of its divisors is an integer number (2700297).

Almost surely, 2^28135222 is an apocalyptic number.

28135222 is a deficient number, since it is larger than the sum of its proper divisors (15069530).

28135222 is a wasteful number, since it uses less digits than its factorization.

28135222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1983.

The product of its digits is 1920, while the sum is 25.

The square root of 28135222 is about 5304.2645107498. The cubic root of 28135222 is about 304.1469381420.

The spelling of 28135222 in words is "twenty-eight million, one hundred thirty-five thousand, two hundred twenty-two".