27270381 has 4 divisors (see below), whose sum is σ = 36360512. Its totient is φ = 18180252.

The previous prime is 27270379. The next prime is 27270409. The reversal of 27270381 is 18307272.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 27270381 - 2¹ = 27270379 is a prime.

It is a super-2 number, since 2×27270381² = 1487347359770322, which contains 22 as substring.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27270311) 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, 4545061 + ... + 4545066.

It is an arithmetic number, because the mean of its divisors is an integer number (9090128).

Almost surely, 2^27270381 is an apocalyptic number.

It is an amenable number.

27270381 is a deficient number, since it is larger than the sum of its proper divisors (9090131).

27270381 is an equidigital number, since it uses as much as digits as its factorization.

27270381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9090130.

The product of its (nonzero) digits is 4704, while the sum is 30.

The square root of 27270381 is about 5222.1050353282. The cubic root of 27270381 is about 300.9980868375.

The spelling of 27270381 in words is "twenty-seven million, two hundred seventy thousand, three hundred eighty-one".