280330328 has 8 divisors (see below), whose sum is σ = 525619380. Its totient is φ = 140165160.

The previous prime is 280330321. The next prime is 280330343. The reversal of 280330328 is 823033082.

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 280330328.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (280330321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17520638 + ... + 17520653.

Almost surely, 2^280330328 is an apocalyptic number.

It is an amenable number.

280330328 is a deficient number, since it is larger than the sum of its proper divisors (245289052).

280330328 is a wasteful number, since it uses less digits than its factorization.

280330328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35041297 (or 35041293 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 29.

The square root of 280330328 is about 16743.0680581547. The cubic root of 280330328 is about 654.4704287417.

The spelling of 280330328 in words is "two hundred eighty million, three hundred thirty thousand, three hundred twenty-eight".