28463981952 has 128 divisors (see below), whose sum is σ = 86585760000. Its totient is φ = 8115886080.

The previous prime is 28463981929. The next prime is 28463981963. The reversal of 28463981952 is 25918936482.

It is a tau number, because it is divible by the number of its divisors (128).

It is a junction number, because it is equal to n+sod(n) for n = 28463981892 and 28463981901.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1330702 + ... + 1351922.

It is an arithmetic number, because the mean of its divisors is an integer number (676451250).

Almost surely, 2^28463981952 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 28463981952, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43292880000).

28463981952 is an abundant number, since it is smaller than the sum of its proper divisors (58121778048).

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

28463981952 is a wasteful number, since it uses less digits than its factorization.

28463981952 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21744 (or 21732 counting only the distinct ones).

The product of its digits is 7464960, while the sum is 57.

The spelling of 28463981952 in words is "twenty-eight billion, four hundred sixty-three million, nine hundred eighty-one thousand, nine hundred fifty-two".