27945407 has 4 divisors (see below), whose sum is σ = 31937616. Its totient is φ = 23953200.

The previous prime is 27945403. The next prime is 27945427. The reversal of 27945407 is 70454972.

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

It is a cyclic number.

It is not a de Polignac number, because 27945407 - 2² = 27945403 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27945403) 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, 1996094 + ... + 1996107.

It is an arithmetic number, because the mean of its divisors is an integer number (7984404).

Almost surely, 2^27945407 is an apocalyptic number.

27945407 is a deficient number, since it is larger than the sum of its proper divisors (3992209).

27945407 is an equidigital number, since it uses as much as digits as its factorization.

27945407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3992208.

The product of its (nonzero) digits is 70560, while the sum is 38.

The square root of 27945407 is about 5286.3415515837. The cubic root of 27945407 is about 303.4614158072.

The spelling of 27945407 in words is "twenty-seven million, nine hundred forty-five thousand, four hundred seven".