280609338 has 16 divisors (see below), whose sum is σ = 585619776. Its totient is φ = 89469600.

The previous prime is 280609331. The next prime is 280609339. The reversal of 280609338 is 833906082.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 280609296 and 280609305.

It is not an unprimeable number, because it can be changed into a prime (280609331) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 1016563 + ... + 1016838.

It is an arithmetic number, because the mean of its divisors is an integer number (36601236).

Almost surely, 2^280609338 is an apocalyptic number.

280609338 is an abundant number, since it is smaller than the sum of its proper divisors (305010438).

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

280609338 is a wasteful number, since it uses less digits than its factorization.

280609338 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2033429.

The product of its (nonzero) digits is 62208, while the sum is 39.

The square root of 280609338 is about 16751.3980909057. The cubic root of 280609338 is about 654.6874860586.

The spelling of 280609338 in words is "two hundred eighty million, six hundred nine thousand, three hundred thirty-eight".