27804028647 has 4 divisors (see below), whose sum is σ = 37072038200. Its totient is φ = 18536019096.

The previous prime is 27804028529. The next prime is 27804028667. The reversal of 27804028647 is 74682040872.

It is a happy number.

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

It is not a de Polignac number, because 27804028647 - 2²² = 27799834343 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 27804028596 and 27804028605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27804028667) 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, 4634004772 + ... + 4634004777.

It is an arithmetic number, because the mean of its divisors is an integer number (9268009550).

Almost surely, 2^27804028647 is an apocalyptic number.

27804028647 is a deficient number, since it is larger than the sum of its proper divisors (9268009553).

27804028647 is an equidigital number, since it uses as much as digits as its factorization.

27804028647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9268009552.

The product of its (nonzero) digits is 1204224, while the sum is 48.

The spelling of 27804028647 in words is "twenty-seven billion, eight hundred four million, twenty-eight thousand, six hundred forty-seven".