28372583 has 4 divisors (see below), whose sum is σ = 28417488. Its totient is φ = 28327680.

The previous prime is 28372579. The next prime is 28372601. The reversal of 28372583 is 38527382.

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

It is a cyclic number.

It is not a de Polignac number, because 28372583 - 2² = 28372579 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 (28372283) 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, 21491 + ... + 22772.

It is an arithmetic number, because the mean of its divisors is an integer number (7104372).

Almost surely, 2^28372583 is an apocalyptic number.

28372583 is a deficient number, since it is larger than the sum of its proper divisors (44905).

28372583 is an equidigital number, since it uses as much as digits as its factorization.

28372583 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44904.

The product of its digits is 80640, while the sum is 38.

The square root of 28372583 is about 5326.5920624730. The cubic root of 28372583 is about 304.9998495027. Note that the first 3 decimals are identical.

The spelling of 28372583 in words is "twenty-eight million, three hundred seventy-two thousand, five hundred eighty-three".