280348368 has 80 divisors (see below), whose sum is σ = 740666880. Its totient is φ = 91352448.

The previous prime is 280348351. The next prime is 280348381. The reversal of 280348368 is 863843082.

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, 575421 + ... + 575907.

It is an arithmetic number, because the mean of its divisors is an integer number (9258336).

Almost surely, 2^280348368 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 280348368, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (370333440).

280348368 is an abundant number, since it is smaller than the sum of its proper divisors (460318512).

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

280348368 is a wasteful number, since it uses less digits than its factorization.

280348368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 744 (or 738 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 42.

The square root of 280348368 is about 16743.6067799026. The cubic root of 280348368 is about 654.4844674097.

The spelling of 280348368 in words is "two hundred eighty million, three hundred forty-eight thousand, three hundred sixty-eight".