28200433 has 4 divisors (see below), whose sum is σ = 29859300. Its totient is φ = 26541568.

The previous prime is 28200409. The next prime is 28200439. The reversal of 28200433 is 33400282.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 24770529 + 3429904 = 4977^2 + 1852^2 .

It is a cyclic number.

It is not a de Polignac number, because 28200433 - 2⁹ = 28199921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28200439) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 829408 + ... + 829441.

It is an arithmetic number, because the mean of its divisors is an integer number (7464825).

Almost surely, 2^28200433 is an apocalyptic number.

It is an amenable number.

28200433 is a deficient number, since it is larger than the sum of its proper divisors (1658867).

28200433 is a wasteful number, since it uses less digits than its factorization.

28200433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1658866.

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 28200433 is about 5310.4079880928. The cubic root of 28200433 is about 304.3817378099.

The spelling of 28200433 in words is "twenty-eight million, two hundred thousand, four hundred thirty-three".