28032421248 has 256 divisors, whose sum is σ = 93791040000. Its totient is φ = 8171145216.

The previous prime is 28032421237. The next prime is 28032421253. The reversal of 28032421248 is 84212423082.

28032421248 is a `hidden beast` number, since 2 + 80 + 324 + 212 + 48 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 837213 + ... + 870051.

It is an arithmetic number, because the mean of its divisors is an integer number (366371250).

Almost surely, 2^28032421248 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 28032421248, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46895520000).

28032421248 is an abundant number, since it is smaller than the sum of its proper divisors (65758618752).

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

28032421248 is a wasteful number, since it uses less digits than its factorization.

28032421248 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32894 (or 32876 counting only the distinct ones).

The product of its (nonzero) digits is 49152, while the sum is 36.

The spelling of 28032421248 in words is "twenty-eight billion, thirty-two million, four hundred twenty-one thousand, two hundred forty-eight".