28383133 has 2 divisors, whose sum is σ = 28383134. Its totient is φ = 28383132.

The previous prime is 28383109. The next prime is 28383161. The reversal of 28383133 is 33138382.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23600164 + 4782969 = 4858^2 + 2187^2 .

It is a cyclic number.

It is not a de Polignac number, because 28383133 - 2⁵ = 28383101 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28383095 and 28383104.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28383533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14191566 + 14191567.

It is an arithmetic number, because the mean of its divisors is an integer number (14191567).

Almost surely, 2^28383133 is an apocalyptic number.

It is an amenable number.

28383133 is a deficient number, since it is larger than the sum of its proper divisors (1).

28383133 is an equidigital number, since it uses as much as digits as its factorization.

28383133 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10368, while the sum is 31.

The square root of 28383133 is about 5327.5822846766. The cubic root of 28383133 is about 305.0376483133.

It can be divided in two parts, 28 and 383133, that added together give a square (383161 = 619²).

The spelling of 28383133 in words is "twenty-eight million, three hundred eighty-three thousand, one hundred thirty-three".