8278427 has 4 divisors (see below), whose sum is σ = 8563920. Its totient is φ = 7992936.

The previous prime is 8278421. The next prime is 8278477. The reversal of 8278427 is 7248728.

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 8278427 - 2⁴ = 8278411 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8278421) 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, 142703 + ... + 142760.

It is an arithmetic number, because the mean of its divisors is an integer number (2140980).

Almost surely, 2^8278427 is an apocalyptic number.

8278427 is a deficient number, since it is larger than the sum of its proper divisors (285493).

8278427 is a wasteful number, since it uses less digits than its factorization.

8278427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285492.

The product of its digits is 50176, while the sum is 38.

The square root of 8278427 is about 2877.2255733606. The cubic root of 8278427 is about 202.2938164543.

The spelling of 8278427 in words is "eight million, two hundred seventy-eight thousand, four hundred twenty-seven".