280428338 has 8 divisors (see below), whose sum is σ = 421580700. Its totient is φ = 139901440.

The previous prime is 280428331. The next prime is 280428359. The reversal of 280428338 is 833824082.

It can be written as a sum of positive squares in 2 ways, for example, as 269846329 + 10582009 = 16427^2 + 3253^2 .

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

It is not an unprimeable number, because it can be changed into a prime (280428331) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 155243 + ... + 157038.

Almost surely, 2^280428338 is an apocalyptic number.

280428338 is a deficient number, since it is larger than the sum of its proper divisors (141152362).

280428338 is a wasteful number, since it uses less digits than its factorization.

280428338 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 312732.

The product of its (nonzero) digits is 73728, while the sum is 38.

The square root of 280428338 is about 16745.9946852971. The cubic root of 280428338 is about 654.5466925470.

The spelling of 280428338 in words is "two hundred eighty million, four hundred twenty-eight thousand, three hundred thirty-eight".