27398928479 has 4 divisors (see below), whose sum is σ = 29506538376. Its totient is φ = 25291318584.

The previous prime is 27398928463. The next prime is 27398928499. The reversal of 27398928479 is 97482989372.

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 27398928479 - 2⁴ = 27398928463 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27398928449) 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, 1053804929 + ... + 1053804954.

It is an arithmetic number, because the mean of its divisors is an integer number (7376634594).

Almost surely, 2^27398928479 is an apocalyptic number.

27398928479 is a deficient number, since it is larger than the sum of its proper divisors (2107609897).

27398928479 is a wasteful number, since it uses less digits than its factorization.

27398928479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2107609896.

The product of its digits is 109734912, while the sum is 68.

The spelling of 27398928479 in words is "twenty-seven billion, three hundred ninety-eight million, nine hundred twenty-eight thousand, four hundred seventy-nine".