28193833 has 2 divisors, whose sum is σ = 28193834. Its totient is φ = 28193832.

The previous prime is 28193821. The next prime is 28193857. The reversal of 28193833 is 33839182.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28164249 + 29584 = 5307^2 + 172^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28193833 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28193792 and 28193801.

It is not a weakly prime, because it can be changed into another prime (28193813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14096916 + 14096917.

It is an arithmetic number, because the mean of its divisors is an integer number (14096917).

Almost surely, 2^28193833 is an apocalyptic number.

It is an amenable number.

28193833 is a deficient number, since it is larger than the sum of its proper divisors (1).

28193833 is an equidigital number, since it uses as much as digits as its factorization.

28193833 is an evil number, because the sum of its binary digits is even.

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

The square root of 28193833 is about 5309.7865305490. The cubic root of 28193833 is about 304.3579902287.

The spelling of 28193833 in words is "twenty-eight million, one hundred ninety-three thousand, eight hundred thirty-three".