28389737952 has 240 divisors, whose sum is σ = 85972803840. Its totient is φ = 9185073408.

The previous prime is 28389737939. The next prime is 28389737983. The reversal of 28389737952 is 25973798382.

It is a self number, because there is not a number n which added to its sum of digits gives 28389737952.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 19949913 + ... + 19951335.

It is an arithmetic number, because the mean of its divisors is an integer number (358220016).

Almost surely, 2^28389737952 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 28389737952, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42986401920).

28389737952 is an abundant number, since it is smaller than the sum of its proper divisors (57583065888).

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

28389737952 is a wasteful number, since it uses less digits than its factorization.

28389737952 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1667 (or 1650 counting only the distinct ones).

The product of its digits is 45722880, while the sum is 63.

The spelling of 28389737952 in words is "twenty-eight billion, three hundred eighty-nine million, seven hundred thirty-seven thousand, nine hundred fifty-two".