280227328 has 40 divisors (see below), whose sum is σ = 565555320. Its totient is φ = 138700800.

The previous prime is 280227317. The next prime is 280227341. The reversal of 280227328 is 823722082.

It is a junction number, because it is equal to n+sod(n) for n = 280227293 and 280227302.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49003 + ... + 54421.

It is an arithmetic number, because the mean of its divisors is an integer number (14138883).

Almost surely, 2^280227328 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 280227328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (282777660).

280227328 is an abundant number, since it is smaller than the sum of its proper divisors (285327992).

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

280227328 is an equidigital number, since it uses as much as digits as its factorization.

280227328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5538 (or 5522 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 34.

The square root of 280227328 is about 16739.9918757447. The cubic root of 280227328 is about 654.3902629454.

The spelling of 280227328 in words is "two hundred eighty million, two hundred twenty-seven thousand, three hundred twenty-eight".