280084990 has 8 divisors (see below), whose sum is σ = 504153000. Its totient is φ = 112033992.

The previous prime is 280084963. The next prime is 280084993. The reversal of 280084990 is 99480082.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (280084993) 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, 14004240 + ... + 14004259.

It is an arithmetic number, because the mean of its divisors is an integer number (63019125).

Almost surely, 2^280084990 is an apocalyptic number.

280084990 is a deficient number, since it is larger than the sum of its proper divisors (224068010).

280084990 is a wasteful number, since it uses less digits than its factorization.

280084990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28008506.

The product of its (nonzero) digits is 41472, while the sum is 40.

The square root of 280084990 is about 16735.7398999865. The cubic root of 280084990 is about 654.2794477049.

The spelling of 280084990 in words is "two hundred eighty million, eighty-four thousand, nine hundred ninety".