280980440 has 32 divisors (see below), whose sum is σ = 680838480. Its totient is φ = 103746432.

The previous prime is 280980439. The next prime is 280980451. The reversal of 280980440 is 44089082.

It is a self number, because there is not a number n which added to its sum of digits gives 280980440.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 269654 + ... + 270693.

Almost surely, 2^280980440 is an apocalyptic number.

280980440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

280980440 is an abundant number, since it is smaller than the sum of its proper divisors (399858040).

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

280980440 is a wasteful number, since it uses less digits than its factorization.

280980440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 540371 (or 540367 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 35.

The square root of 280980440 is about 16762.4711782004. The cubic root of 280980440 is about 654.9759639996.

The spelling of 280980440 in words is "two hundred eighty million, nine hundred eighty thousand, four hundred forty".