27381745 has 4 divisors (see below), whose sum is σ = 32858100. Its totient is φ = 21905392.

The previous prime is 27381743. The next prime is 27381763. The reversal of 27381745 is 54718372.

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 9412624 + 17969121 = 3068^2 + 4239^2 .

It is a cyclic number.

It is not a de Polignac number, because 27381745 - 2¹ = 27381743 is a prime.

It is not an unprimeable number, because it can be changed into a prime (27381743) 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, 2738170 + ... + 2738179.

It is an arithmetic number, because the mean of its divisors is an integer number (8214525).

Almost surely, 2^27381745 is an apocalyptic number.

It is an amenable number.

27381745 is a deficient number, since it is larger than the sum of its proper divisors (5476355).

27381745 is an equidigital number, since it uses as much as digits as its factorization.

27381745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5476354.

The product of its digits is 47040, while the sum is 37.

The square root of 27381745 is about 5232.7569215472. The cubic root of 27381745 is about 301.4072587908.

The spelling of 27381745 in words is "twenty-seven million, three hundred eighty-one thousand, seven hundred forty-five".