27722393 has 6 divisors (see below), whose sum is σ = 29376126. Its totient is φ = 26071232.

The previous prime is 27722371. The next prime is 27722417. The reversal of 27722393 is 39322772.

It can be written as a sum of positive squares in 3 ways, for example, as 11505664 + 16216729 = 3392^2 + 4027^2 .

It is not a de Polignac number, because 27722393 - 2¹⁶ = 27656857 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (27722353) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 21071 + ... + 22347.

It is an arithmetic number, because the mean of its divisors is an integer number (4896021).

Almost surely, 2^27722393 is an apocalyptic number.

It is an amenable number.

27722393 is a deficient number, since it is larger than the sum of its proper divisors (1653733).

27722393 is an frugal number, since it uses more digits than its factorization.

27722393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2571 (or 1294 counting only the distinct ones).

The product of its digits is 31752, while the sum is 35.

The square root of 27722393 is about 5265.2058839138. The cubic root of 27722393 is about 302.6520165746.

The spelling of 27722393 in words is "twenty-seven million, seven hundred twenty-two thousand, three hundred ninety-three".