27438745 has 8 divisors (see below), whose sum is σ = 32969160. Its totient is φ = 21922560.

The previous prime is 27438709. The next prime is 27438757. The reversal of 27438745 is 54783472.

It can be written as a sum of positive squares in 4 ways, for example, as 595984 + 26842761 = 772^2 + 5181^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 27438745 - 2⁹ = 27438233 is a prime.

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

It is a junction number, because it is equal to n+sod(n) for n = 27438698 and 27438707.

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 7 ways as a sum of consecutive naturals, for example, 1291 + ... + 7519.

It is an arithmetic number, because the mean of its divisors is an integer number (4121145).

Almost surely, 2^27438745 is an apocalyptic number.

It is an amenable number.

27438745 is a deficient number, since it is larger than the sum of its proper divisors (5530415).

27438745 is an equidigital number, since it uses as much as digits as its factorization.

27438745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7115.

The product of its digits is 188160, while the sum is 40.

The square root of 27438745 is about 5238.2005498072. The cubic root of 27438745 is about 301.6162582086.

The spelling of 27438745 in words is "twenty-seven million, four hundred thirty-eight thousand, seven hundred forty-five".