27798979387 has 8 divisors (see below), whose sum is σ = 28114521120. Its totient is φ = 27483508800.

The previous prime is 27798979337. The next prime is 27798979421. The reversal of 27798979387 is 78397989772.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 27798979387 - 2¹⁹ = 27798455099 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27798979337) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1430637 + ... + 1449937.

It is an arithmetic number, because the mean of its divisors is an integer number (3514315140).

Almost surely, 2^27798979387 is an apocalyptic number.

27798979387 is a deficient number, since it is larger than the sum of its proper divisors (315541733).

27798979387 is a wasteful number, since it uses less digits than its factorization.

27798979387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35573.

The product of its digits is 672126336, while the sum is 76.

The spelling of 27798979387 in words is "twenty-seven billion, seven hundred ninety-eight million, nine hundred seventy-nine thousand, three hundred eighty-seven".