27722272 has 24 divisors (see below), whose sum is σ = 55850256. Its totient is φ = 13538112.

The previous prime is 27722269. The next prime is 27722281. The reversal of 27722272 is 27222772.

It is a happy number.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8698 + ... + 11449.

It is an arithmetic number, because the mean of its divisors is an integer number (2327094).

Almost surely, 2^27722272 is an apocalyptic number.

It is an amenable number.

27722272 is an abundant number, since it is smaller than the sum of its proper divisors (28127984).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

27722272 is a wasteful number, since it uses less digits than its factorization.

27722272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20200 (or 20192 counting only the distinct ones).

The product of its digits is 10976, while the sum is 31.

The square root of 27722272 is about 5265.1943933724. The cubic root of 27722272 is about 302.6515762453.

Subtracting from 27722272 its reverse (27222772), we obtain a triangular number (499500 = T₉₉₉).

The spelling of 27722272 in words is "twenty-seven million, seven hundred twenty-two thousand, two hundred seventy-two".