16278427 has 4 divisors (see below), whose sum is σ = 17758296. Its totient is φ = 14798560.

The previous prime is 16278419. The next prime is 16278433. The reversal of 16278427 is 72487261.

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 16278427 - 2³ = 16278419 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16278487) 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, 739918 + ... + 739939.

It is an arithmetic number, because the mean of its divisors is an integer number (4439574).

Almost surely, 2^16278427 is an apocalyptic number.

16278427 is a deficient number, since it is larger than the sum of its proper divisors (1479869).

16278427 is a wasteful number, since it uses less digits than its factorization.

16278427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1479868.

The product of its digits is 37632, while the sum is 37.

The square root of 16278427 is about 4034.6532688696. The cubic root of 16278427 is about 253.4374627717.

The spelling of 16278427 in words is "sixteen million, two hundred seventy-eight thousand, four hundred twenty-seven".