280297338 has 8 divisors (see below), whose sum is σ = 560594688. Its totient is φ = 93432444.

The previous prime is 280297333. The next prime is 280297357. The reversal of 280297338 is 833792082.

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

280297338 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 280297338.

It is not an unprimeable number, because it can be changed into a prime (280297333) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23358106 + ... + 23358117.

It is an arithmetic number, because the mean of its divisors is an integer number (70074336).

Almost surely, 2^280297338 is an apocalyptic number.

280297338 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

280297338 is a wasteful number, since it uses less digits than its factorization.

280297338 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46716228.

The product of its (nonzero) digits is 145152, while the sum is 42.

The square root of 280297338 is about 16742.0828453332. The cubic root of 280297338 is about 654.4447544754. Note that the first 3 decimals are identical.

The spelling of 280297338 in words is "two hundred eighty million, two hundred ninety-seven thousand, three hundred thirty-eight".