28839969792 has 132 divisors (see below), whose sum is σ = 83394616240. Its totient is φ = 9599496192.

The previous prime is 28839969757. The next prime is 28839969827. The reversal of 28839969792 is 29796993882.

It is an interprime number because it is at equal distance from previous prime (28839969757) and next prime (28839969827).

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a self number, because there is not a number n which added to its sum of digits gives 28839969792.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7914723 + ... + 7918365.

Almost surely, 2^28839969792 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28839969792, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41697308120).

28839969792 is an abundant number, since it is smaller than the sum of its proper divisors (54554646448).

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

28839969792 is a wasteful number, since it uses less digits than its factorization.

28839969792 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4528 (or 4507 counting only the distinct ones).

The product of its digits is 211631616, while the sum is 72.

The spelling of 28839969792 in words is "twenty-eight billion, eight hundred thirty-nine million, nine hundred sixty-nine thousand, seven hundred ninety-two".