28199833 has 2 divisors, whose sum is σ = 28199834. Its totient is φ = 28199832.

The previous prime is 28199807. The next prime is 28199837. The reversal of 28199833 is 33899182.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21455424 + 6744409 = 4632^2 + 2597^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28199833 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28199833.

It is not a weakly prime, because it can be changed into another prime (28199837) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14099916 + 14099917.

It is an arithmetic number, because the mean of its divisors is an integer number (14099917).

Almost surely, 2^28199833 is an apocalyptic number.

It is an amenable number.

28199833 is a deficient number, since it is larger than the sum of its proper divisors (1).

28199833 is an equidigital number, since it uses as much as digits as its factorization.

28199833 is an evil number, because the sum of its binary digits is even.

The product of its digits is 93312, while the sum is 43.

The square root of 28199833 is about 5310.3514949577. The cubic root of 28199833 is about 304.3795790920.

The spelling of 28199833 in words is "twenty-eight million, one hundred ninety-nine thousand, eight hundred thirty-three".