28321481952 has 384 divisors, whose sum is σ = 88414986240. Its totient is φ = 8805888000.

The previous prime is 28321481939. The next prime is 28321481987. The reversal of 28321481952 is 25918412382.

28321481952 is a `hidden beast` number, since 2 + 83 + 2 + 1 + 481 + 95 + 2 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 28321481898 and 28321481907.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 100788052 + ... + 100788332.

It is an arithmetic number, because the mean of its divisors is an integer number (230247360).

Almost surely, 2^28321481952 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 28321481952, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44207493120).

28321481952 is an abundant number, since it is smaller than the sum of its proper divisors (60093504288).

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

28321481952 is a wasteful number, since it uses less digits than its factorization.

28321481952 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 455 (or 441 counting only the distinct ones).

The product of its digits is 276480, while the sum is 45.

The spelling of 28321481952 in words is "twenty-eight billion, three hundred twenty-one million, four hundred eighty-one thousand, nine hundred fifty-two".