28000333031 has 12 divisors (see below), whose sum is σ = 30781336992. Its totient is φ = 25451448000.

The previous prime is 28000333007. The next prime is 28000333037. The reversal of 28000333031 is 13033300082.

It is not a de Polignac number, because 28000333031 - 2¹⁸ = 28000070887 is a prime.

It is a super-2 number, since 2×28000333031² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28000332988 and 28000333006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28000333037) 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 11 ways as a sum of consecutive naturals, for example, 1530146 + ... + 1548336.

It is an arithmetic number, because the mean of its divisors is an integer number (2565111416).

Almost surely, 2^28000333031 is an apocalyptic number.

28000333031 is a deficient number, since it is larger than the sum of its proper divisors (2781003961).

28000333031 is a wasteful number, since it uses less digits than its factorization.

28000333031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30934 (or 30923 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 23.

The spelling of 28000333031 in words is "twenty-eight billion, three hundred thirty-three thousand, thirty-one".