28989587724 has 48 divisors (see below), whose sum is σ = 70654321920. Its totient is φ = 9239388480.

The previous prime is 28989587707. The next prime is 28989587729. The reversal of 28989587724 is 42778598982.

It is not an unprimeable number, because it can be changed into a prime (28989587729) 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 15 ways as a sum of consecutive naturals, for example, 368542 + ... + 440229.

It is an arithmetic number, because the mean of its divisors is an integer number (1471965040).

Almost surely, 2^28989587724 is an apocalyptic number.

It is an amenable number.

28989587724 is an abundant number, since it is smaller than the sum of its proper divisors (41664734196).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28989587724 is a wasteful number, since it uses less digits than its factorization.

28989587724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 808910 (or 808908 counting only the distinct ones).

The product of its digits is 162570240, while the sum is 69.

The spelling of 28989587724 in words is "twenty-eight billion, nine hundred eighty-nine million, five hundred eighty-seven thousand, seven hundred twenty-four".