27478423 has 4 divisors (see below), whose sum is σ = 31403920. Its totient is φ = 23552928.

The previous prime is 27478417. The next prime is 27478447. The reversal of 27478423 is 32487472.

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

It is not a de Polignac number, because 27478423 - 2²¹ = 25381271 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 (27478453) 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, 1962738 + ... + 1962751.

It is an arithmetic number, because the mean of its divisors is an integer number (7850980).

Almost surely, 2^27478423 is an apocalyptic number.

27478423 is a deficient number, since it is larger than the sum of its proper divisors (3925497).

27478423 is an equidigital number, since it uses as much as digits as its factorization.

27478423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3925496.

The product of its digits is 75264, while the sum is 37.

The square root of 27478423 is about 5241.9865509175. The cubic root of 27478423 is about 301.7615729931.

The spelling of 27478423 in words is "twenty-seven million, four hundred seventy-eight thousand, four hundred twenty-three".