280220000256 has 1120 divisors, whose sum is σ = 1038303687168. Its totient is φ = 73574645760.

The previous prime is 280220000173. The next prime is 280220000287. The reversal of 280220000256 is 652000022082.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 4593770466 + ... + 4593770526.

Almost surely, 2^280220000256 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 280220000256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (519151843584).

280220000256 is an abundant number, since it is smaller than the sum of its proper divisors (758083686912).

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

280220000256 is an equidigital number, since it uses as much as digits as its factorization.

280220000256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172 (or 139 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The spelling of 280220000256 in words is "two hundred eighty billion, two hundred twenty million, two hundred fifty-six", and thus it is an aban number.