28432533 has 8 divisors (see below), whose sum is σ = 37984896. Its totient is φ = 18917600.

The previous prime is 28432529. The next prime is 28432559. The reversal of 28432533 is 33523482.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28432533 - 2² = 28432529 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28432533.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28432333) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7533 + ... + 10658.

It is an arithmetic number, because the mean of its divisors is an integer number (4748112).

Almost surely, 2^28432533 is an apocalyptic number.

It is an amenable number.

28432533 is a deficient number, since it is larger than the sum of its proper divisors (9552363).

28432533 is a wasteful number, since it uses less digits than its factorization.

28432533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18715.

The product of its digits is 17280, while the sum is 30.

The square root of 28432533 is about 5332.2165184846. The cubic root of 28432533 is about 305.2145153980.

The spelling of 28432533 in words is "twenty-eight million, four hundred thirty-two thousand, five hundred thirty-three".