28885223831 has 4 divisors (see below), whose sum is σ = 30141103152. Its totient is φ = 27629344512.

The previous prime is 28885223767. The next prime is 28885223833. The reversal of 28885223831 is 13832258882.

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 28885223831 - 2⁶ = 28885223767 is a prime.

It is a super-2 number, since 2×28885223831² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28885223831.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28885223833) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 627939626 + ... + 627939671.

It is an arithmetic number, because the mean of its divisors is an integer number (7535275788).

Almost surely, 2^28885223831 is an apocalyptic number.

28885223831 is a deficient number, since it is larger than the sum of its proper divisors (1255879321).

28885223831 is a wasteful number, since it uses less digits than its factorization.

28885223831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1255879320.

The product of its digits is 1474560, while the sum is 50.

The spelling of 28885223831 in words is "twenty-eight billion, eight hundred eighty-five million, two hundred twenty-three thousand, eight hundred thirty-one".