280786116 has 96 divisors (see below), whose sum is σ = 742855680. Its totient is φ = 81899136.

The previous prime is 280786073. The next prime is 280786141. The reversal of 280786116 is 611687082.

It is a Harshad number since it is a multiple of its sum of digits (39).

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 31 ways as a sum of consecutive naturals, for example, 498451 + ... + 499013.

It is an arithmetic number, because the mean of its divisors is an integer number (7738080).

Almost surely, 2^280786116 is an apocalyptic number.

280786116 is a gapful number since it is divisible by the number (26) 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 280786116, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (371427840).

280786116 is an abundant number, since it is smaller than the sum of its proper divisors (462069564).

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

280786116 is a wasteful number, since it uses less digits than its factorization.

280786116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 745 (or 743 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 39.

The square root of 280786116 is about 16756.6737749471. The cubic root of 280786116 is about 654.8249369958.

The spelling of 280786116 in words is "two hundred eighty million, seven hundred eighty-six thousand, one hundred sixteen".