28277923399 has 4 divisors (see below), whose sum is σ = 30848643720. Its totient is φ = 25707203080.

The previous prime is 28277923391. The next prime is 28277923411. The reversal of 28277923399 is 99332977282.

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 28277923399 - 2³ = 28277923391 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 (28277923391) 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, 1285360144 + ... + 1285360165.

It is an arithmetic number, because the mean of its divisors is an integer number (7712160930).

Almost surely, 2^28277923399 is an apocalyptic number.

28277923399 is a deficient number, since it is larger than the sum of its proper divisors (2570720321).

28277923399 is a wasteful number, since it uses less digits than its factorization.

28277923399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2570720320.

The product of its digits is 20575296, while the sum is 61.

The spelling of 28277923399 in words is "twenty-eight billion, two hundred seventy-seven million, nine hundred twenty-three thousand, three hundred ninety-nine".