28213172383 has 4 divisors (see below), whose sum is σ = 30778006248. Its totient is φ = 25648338520.

The previous prime is 28213172311. The next prime is 28213172431. The reversal of 28213172383 is 38327131282.

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-28213172383 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28213172303) 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, 1282416916 + ... + 1282416937.

It is an arithmetic number, because the mean of its divisors is an integer number (7694501562).

Almost surely, 2^28213172383 is an apocalyptic number.

28213172383 is a deficient number, since it is larger than the sum of its proper divisors (2564833865).

28213172383 is a wasteful number, since it uses less digits than its factorization.

28213172383 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2564833864.

The product of its digits is 96768, while the sum is 40.

The spelling of 28213172383 in words is "twenty-eight billion, two hundred thirteen million, one hundred seventy-two thousand, three hundred eighty-three".