27890427 has 4 divisors (see below), whose sum is σ = 37187240. Its totient is φ = 18593616.

The previous prime is 27890417. The next prime is 27890477. The reversal of 27890427 is 72409872.

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

It is not a de Polignac number, because 27890427 - 2⁶ = 27890363 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27890417) 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, 4648402 + ... + 4648407.

It is an arithmetic number, because the mean of its divisors is an integer number (9296810).

Almost surely, 2^27890427 is an apocalyptic number.

27890427 is a deficient number, since it is larger than the sum of its proper divisors (9296813).

27890427 is an equidigital number, since it uses as much as digits as its factorization.

27890427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9296812.

The product of its (nonzero) digits is 56448, while the sum is 39.

The square root of 27890427 is about 5281.1387976458. The cubic root of 27890427 is about 303.2622744095.

The spelling of 27890427 in words is "twenty-seven million, eight hundred ninety thousand, four hundred twenty-seven".