28523420983 has 4 divisors (see below), whose sum is σ = 28668210120. Its totient is φ = 28378631848.

The previous prime is 28523420971. The next prime is 28523420987. The reversal of 28523420983 is 38902432582.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28523420983 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 (28523420987) 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 3 ways as a sum of consecutive naturals, for example, 72394273 + ... + 72394666.

It is an arithmetic number, because the mean of its divisors is an integer number (7167052530).

Almost surely, 2^28523420983 is an apocalyptic number.

28523420983 is a deficient number, since it is larger than the sum of its proper divisors (144789137).

28523420983 is a wasteful number, since it uses less digits than its factorization.

28523420983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144789136.

The product of its (nonzero) digits is 829440, while the sum is 46.

The spelling of 28523420983 in words is "twenty-eight billion, five hundred twenty-three million, four hundred twenty thousand, nine hundred eighty-three".