27045381 has 16 divisors (see below), whose sum is σ = 39426048. Its totient is φ = 16354800.

The previous prime is 27045377. The next prime is 27045439. The reversal of 27045381 is 18354072.

It is not a de Polignac number, because 27045381 - 2² = 27045377 is a prime.

It is a super-2 number, since 2×27045381² = 1462905266870322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27045311) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26796 + ... + 27786.

It is an arithmetic number, because the mean of its divisors is an integer number (2464128).

Almost surely, 2^27045381 is an apocalyptic number.

It is an amenable number.

27045381 is a deficient number, since it is larger than the sum of its proper divisors (12380667).

27045381 is a wasteful number, since it uses less digits than its factorization.

27045381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1832.

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 27045381 is about 5200.5173781077. The cubic root of 27045381 is about 300.1679836985.

The spelling of 27045381 in words is "twenty-seven million, forty-five thousand, three hundred eighty-one".