27356381 has 4 divisors (see below), whose sum is σ = 29460732. Its totient is φ = 25252032.

The previous prime is 27356377. The next prime is 27356387. The reversal of 27356381 is 18365372.

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 4268356 + 23088025 = 2066^2 + 4805^2 .

It is not a de Polignac number, because 27356381 - 2² = 27356377 is a prime.

It is a super-2 number, since 2×27356381² = 1496743162834322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27356387) 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, 1052156 + ... + 1052181.

It is an arithmetic number, because the mean of its divisors is an integer number (7365183).

Almost surely, 2^27356381 is an apocalyptic number.

It is an amenable number.

27356381 is a deficient number, since it is larger than the sum of its proper divisors (2104351).

27356381 is a wasteful number, since it uses less digits than its factorization.

27356381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2104350.

The product of its digits is 30240, while the sum is 35.

The square root of 27356381 is about 5230.3327809997. The cubic root of 27356381 is about 301.3141644629.

The spelling of 27356381 in words is "twenty-seven million, three hundred fifty-six thousand, three hundred eighty-one".