280305242 has 16 divisors (see below), whose sum is σ = 497093760. Its totient is φ = 115988208.

The previous prime is 280305241. The next prime is 280305251. The reversal of 280305242 is 242503082.

It is not an unprimeable number, because it can be changed into a prime (280305241) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 344798 + ... + 345609.

It is an arithmetic number, because the mean of its divisors is an integer number (31068360).

Almost surely, 2^280305242 is an apocalyptic number.

280305242 is a deficient number, since it is larger than the sum of its proper divisors (216788518).

280305242 is a wasteful number, since it uses less digits than its factorization.

280305242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 690445.

The product of its (nonzero) digits is 3840, while the sum is 26.

The square root of 280305242 is about 16742.3188955413. The cubic root of 280305242 is about 654.4509058987.

The spelling of 280305242 in words is "two hundred eighty million, three hundred five thousand, two hundred forty-two".