280917327312 has 140 divisors (see below), whose sum is σ = 816773704164. Its totient is φ = 93555233280.

The previous prime is 280917327269. The next prime is 280917327319. The reversal of 280917327312 is 213723719082.

280917327312 is a `hidden beast` number, since 2 + 8 + 0 + 9 + 1 + 7 + 327 + 312 = 666.

280917327312 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 211872407616 + 69044919696 = 460296^2 + 262764^2 .

It is a super-2 number, since 2×280917327312² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (280917327319) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 13764988 + ... + 13785380.

Almost surely, 2^280917327312 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 280917327312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (408386852082).

280917327312 is an abundant number, since it is smaller than the sum of its proper divisors (535856376852).

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

280917327312 is a wasteful number, since it uses less digits than its factorization.

280917327312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21600 (or 21579 counting only the distinct ones).

The product of its (nonzero) digits is 254016, while the sum is 45.

The spelling of 280917327312 in words is "two hundred eighty billion, nine hundred seventeen million, three hundred twenty-seven thousand, three hundred twelve".