28447322550 has 96 divisors (see below), whose sum is σ = 72689886240. Its totient is φ = 7359206400.

The previous prime is 28447322549. The next prime is 28447322551. The reversal of 28447322550 is 5522374482.

It is an interprime number because it is at equal distance from previous prime (28447322549) and next prime (28447322551).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28447322551) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 646656 + ... + 689244.

It is an arithmetic number, because the mean of its divisors is an integer number (757186315).

Almost surely, 2^28447322550 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28447322550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36344943120).

28447322550 is an abundant number, since it is smaller than the sum of its proper divisors (44242563690).

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

28447322550 is a wasteful number, since it uses less digits than its factorization.

28447322550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42738 (or 42733 counting only the distinct ones).

The product of its (nonzero) digits is 537600, while the sum is 42.

The spelling of 28447322550 in words is "twenty-eight billion, four hundred forty-seven million, three hundred twenty-two thousand, five hundred fifty".