280978442 has 8 divisors (see below), whose sum is σ = 439792416. Its totient is φ = 134380972.

The previous prime is 280978433. The next prime is 280978487. The reversal of 280978442 is 244879082.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 280978393 and 280978402.

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 3 ways as a sum of consecutive naturals, for example, 3054068 + ... + 3054159.

It is an arithmetic number, because the mean of its divisors is an integer number (54974052).

Almost surely, 2^280978442 is an apocalyptic number.

280978442 is a deficient number, since it is larger than the sum of its proper divisors (158813974).

280978442 is a wasteful number, since it uses less digits than its factorization.

280978442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6108252.

The product of its (nonzero) digits is 258048, while the sum is 44.

The square root of 280978442 is about 16762.4115806766. The cubic root of 280978442 is about 654.9744115249.

The spelling of 280978442 in words is "two hundred eighty million, nine hundred seventy-eight thousand, four hundred forty-two".