27220409 has 8 divisors (see below), whose sum is σ = 27660360. Its totient is φ = 26784000.

The previous prime is 27220399. The next prime is 27220411. The reversal of 27220409 is 90402272.

It can be written as a sum of positive squares in 4 ways, for example, as 1006009 + 26214400 = 1003^2 + 5120^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 27220409 - 2⁸ = 27220153 is a prime.

It is a super-2 number, since 2×27220409² = 1481901332254562, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27220439) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17537 + ... + 19025.

It is an arithmetic number, because the mean of its divisors is an integer number (3457545).

Almost surely, 2^27220409 is an apocalyptic number.

It is an amenable number.

27220409 is a deficient number, since it is larger than the sum of its proper divisors (439951).

27220409 is a wasteful number, since it uses less digits than its factorization.

27220409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1771.

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 27220409 is about 5217.3181808282. The cubic root of 27220409 is about 300.8141183356.

The spelling of 27220409 in words is "twenty-seven million, two hundred twenty thousand, four hundred nine".