27381445 has 24 divisors (see below), whose sum is σ = 41167224. Its totient is φ = 17329536.

The previous prime is 27381437. The next prime is 27381457. The reversal of 27381445 is 54418372.

It can be written as a sum of positive squares in 4 ways, for example, as 1483524 + 25897921 = 1218^2 + 5089^2 .

It is not a de Polignac number, because 27381445 - 2³ = 27381437 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 27381445.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1114 + ... + 7483.

It is an arithmetic number, because the mean of its divisors is an integer number (1715301).

Almost surely, 2^27381445 is an apocalyptic number.

It is an amenable number.

27381445 is a deficient number, since it is larger than the sum of its proper divisors (13785779).

27381445 is a wasteful number, since it uses less digits than its factorization.

27381445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8629 (or 8622 counting only the distinct ones).

The product of its digits is 26880, while the sum is 34.

The square root of 27381445 is about 5232.7282558910. The cubic root of 27381445 is about 301.4061580269.

It can be divided in two parts, 273 and 81445, that added together give a palindrome (81718).

The spelling of 27381445 in words is "twenty-seven million, three hundred eighty-one thousand, four hundred forty-five".