27628229 has 4 divisors (see below), whose sum is σ = 27665484. Its totient is φ = 27590976.

The previous prime is 27628217. The next prime is 27628259. The reversal of 27628229 is 92282672.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 24304900 + 3323329 = 4930^2 + 1823^2 .

It is a cyclic number.

It is not a de Polignac number, because 27628229 - 2¹⁶ = 27562693 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 27628192 and 27628201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27628259) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17492 + ... + 19005.

It is an arithmetic number, because the mean of its divisors is an integer number (6916371).

Almost surely, 2^27628229 is an apocalyptic number.

It is an amenable number.

27628229 is a deficient number, since it is larger than the sum of its proper divisors (37255).

27628229 is an equidigital number, since it uses as much as digits as its factorization.

27628229 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37254.

The product of its digits is 48384, while the sum is 38.

The square root of 27628229 is about 5256.2561771664. The cubic root of 27628229 is about 302.3089575329.

The spelling of 27628229 in words is "twenty-seven million, six hundred twenty-eight thousand, two hundred twenty-nine".