28893983 has 4 divisors (see below), whose sum is σ = 28981608. Its totient is φ = 28806360.

The previous prime is 28893973. The next prime is 28893989. The reversal of 28893983 is 38939882.

It is a happy number.

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 28893983 - 2¹⁸ = 28631839 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 (28893989) 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, 43316 + ... + 43977.

It is an arithmetic number, because the mean of its divisors is an integer number (7245402).

Almost surely, 2^28893983 is an apocalyptic number.

28893983 is a deficient number, since it is larger than the sum of its proper divisors (87625).

28893983 is an equidigital number, since it uses as much as digits as its factorization.

28893983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87624.

The product of its digits is 746496, while the sum is 50.

The square root of 28893983 is about 5375.3123630167. The cubic root of 28893983 is about 306.8568371246.

The spelling of 28893983 in words is "twenty-eight million, eight hundred ninety-three thousand, nine hundred eighty-three".