280381112 has 64 divisors (see below), whose sum is σ = 599961600. Its totient is φ = 121680000.

The previous prime is 280381099. The next prime is 280381139. The reversal of 280381112 is 211183082.

It is a super-2 number, since 2×280381112² = 157227135932713088, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 214862 + ... + 216162.

It is an arithmetic number, because the mean of its divisors is an integer number (9374400).

Almost surely, 2^280381112 is an apocalyptic number.

280381112 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 280381112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (299980800).

280381112 is an abundant number, since it is smaller than the sum of its proper divisors (319580488).

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

280381112 is a wasteful number, since it uses less digits than its factorization.

280381112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1428 (or 1424 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 26.

The square root of 280381112 is about 16744.5845574024. The cubic root of 280381112 is about 654.5099471432.

The spelling of 280381112 in words is "two hundred eighty million, three hundred eighty-one thousand, one hundred twelve".