27738907 has 4 divisors (see below), whose sum is σ = 31701616. Its totient is φ = 23776200.

The previous prime is 27738899. The next prime is 27738923. The reversal of 27738907 is 70983772.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 27738907 - 2³ = 27738899 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27738947) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 1981344 + ... + 1981357.

It is an arithmetic number, because the mean of its divisors is an integer number (7925404).

Almost surely, 2^27738907 is an apocalyptic number.

27738907 is a deficient number, since it is larger than the sum of its proper divisors (3962709).

27738907 is an equidigital number, since it uses as much as digits as its factorization.

27738907 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3962708.

The product of its (nonzero) digits is 148176, while the sum is 43.

The square root of 27738907 is about 5266.7738702169. The cubic root of 27738907 is about 302.7121004126.

The spelling of 27738907 in words is "twenty-seven million, seven hundred thirty-eight thousand, nine hundred seven".