28989359983 has 4 divisors (see below), whose sum is σ = 29091796168. Its totient is φ = 28886923800.

The previous prime is 28989359977. The next prime is 28989359989. The reversal of 28989359983 is 38995398982.

It is a happy number.

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

It is an interprime number because it is at equal distance from previous prime (28989359977) and next prime (28989359989).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28989359983 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 (28989359989) 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, 51217668 + ... + 51218233.

It is an arithmetic number, because the mean of its divisors is an integer number (7272949042).

Almost surely, 2^28989359983 is an apocalyptic number.

28989359983 is a deficient number, since it is larger than the sum of its proper divisors (102436185).

28989359983 is a wasteful number, since it uses less digits than its factorization.

28989359983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102436184.

The product of its digits is 302330880, while the sum is 73.

The spelling of 28989359983 in words is "twenty-eight billion, nine hundred eighty-nine million, three hundred fifty-nine thousand, nine hundred eighty-three".