27428563 has 4 divisors (see below), whose sum is σ = 27775840. Its totient is φ = 27081288.

The previous prime is 27428543. The next prime is 27428567. The reversal of 27428563 is 36582472.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27428563 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27428567) 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, 173520 + ... + 173677.

It is an arithmetic number, because the mean of its divisors is an integer number (6943960).

Almost surely, 2^27428563 is an apocalyptic number.

27428563 is a deficient number, since it is larger than the sum of its proper divisors (347277).

27428563 is an equidigital number, since it uses as much as digits as its factorization.

27428563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 347276.

The product of its digits is 80640, while the sum is 37.

The square root of 27428563 is about 5237.2285609853. The cubic root of 27428563 is about 301.5789455608.

The spelling of 27428563 in words is "twenty-seven million, four hundred twenty-eight thousand, five hundred sixty-three".