28161022933 has 6 divisors (see below), whose sum is σ = 28239771714. Its totient is φ = 28082291904.

The previous prime is 28161022931. The next prime is 28161022949. The reversal of 28161022933 is 33922016182.

It can be written as a sum of positive squares in 3 ways, for example, as 16636356324 + 11524666609 = 128982^2 + 107353^2 .

It is not a de Polignac number, because 28161022933 - 2¹ = 28161022931 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28161022892 and 28161022901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28161022931) 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 5 ways as a sum of consecutive naturals, for example, 3236653 + ... + 3245341.

It is an arithmetic number, because the mean of its divisors is an integer number (4706628619).

Almost surely, 2^28161022933 is an apocalyptic number.

It is an amenable number.

28161022933 is a deficient number, since it is larger than the sum of its proper divisors (78748781).

28161022933 is an frugal number, since it uses more digits than its factorization.

28161022933 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17751 (or 9062 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 37.

The spelling of 28161022933 in words is "twenty-eight billion, one hundred sixty-one million, twenty-two thousand, nine hundred thirty-three".