28998983 has 4 divisors (see below), whose sum is σ = 31229688. Its totient is φ = 26768280.

The previous prime is 28998979. The next prime is 28998989. The reversal of 28998983 is 38989982.

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 28998983 - 2² = 28998979 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 (28998989) 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, 1115333 + ... + 1115358.

It is an arithmetic number, because the mean of its divisors is an integer number (7807422).

Almost surely, 2^28998983 is an apocalyptic number.

28998983 is a deficient number, since it is larger than the sum of its proper divisors (2230705).

28998983 is a wasteful number, since it uses less digits than its factorization.

28998983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2230704.

The product of its digits is 2239488, while the sum is 56.

The square root of 28998983 is about 5385.0703802272. The cubic root of 28998983 is about 307.2280910942.

Subtracting 28998983 from its reverse (38989982), we obtain a palindrome (9990999).

The spelling of 28998983 in words is "twenty-eight million, nine hundred ninety-eight thousand, nine hundred eighty-three".