28532399 has 8 divisors (see below), whose sum is σ = 32932128. Its totient is φ = 24213600.

The previous prime is 28532389. The next prime is 28532401. The reversal of 28532399 is 99323582.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28532399 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28532359) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19472 + ... + 20885.

It is an arithmetic number, because the mean of its divisors is an integer number (4116516).

Almost surely, 2^28532399 is an apocalyptic number.

28532399 is a deficient number, since it is larger than the sum of its proper divisors (4399729).

28532399 is a wasteful number, since it uses less digits than its factorization.

28532399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40465.

The product of its digits is 116640, while the sum is 41.

The square root of 28532399 is about 5341.5727084820. The cubic root of 28532399 is about 305.5714414563.

The spelling of 28532399 in words is "twenty-eight million, five hundred thirty-two thousand, three hundred ninety-nine".