280221509472 has 96 divisors (see below), whose sum is σ = 751595023872. Its totient is φ = 91375624704.

The previous prime is 280221509441. The next prime is 280221509473. The reversal of 280221509472 is 274905122082.

It is a tau number, because it is divible by the number of its divisors (96).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (280221509473) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10079463 + ... + 10107225.

It is an arithmetic number, because the mean of its divisors is an integer number (7829114832).

Almost surely, 2^280221509472 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 280221509472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (375797511936).

280221509472 is an abundant number, since it is smaller than the sum of its proper divisors (471373514400).

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

280221509472 is a wasteful number, since it uses less digits than its factorization.

280221509472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30060 (or 30052 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 42.

The spelling of 280221509472 in words is "two hundred eighty billion, two hundred twenty-one million, five hundred nine thousand, four hundred seventy-two".