27222642 has 40 divisors (see below), whose sum is σ = 61380396. Its totient is φ = 9017568.

The previous prime is 27222617. The next prime is 27222683. The reversal of 27222642 is 24622272.

It can be written as a sum of positive squares in 2 ways, for example, as 27154521 + 68121 = 5211^2 + 261^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 31488 + ... + 32340.

Almost surely, 2^27222642 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 27222642, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30690198).

27222642 is an abundant number, since it is smaller than the sum of its proper divisors (34157754).

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

27222642 is a wasteful number, since it uses less digits than its factorization.

27222642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1064 (or 1055 counting only the distinct ones).

The product of its digits is 5376, while the sum is 27.

The square root of 27222642 is about 5217.5321752721. The cubic root of 27222642 is about 300.8223437760.

The spelling of 27222642 in words is "twenty-seven million, two hundred twenty-two thousand, six hundred forty-two".