280084487 has 4 divisors (see below), whose sum is σ = 287654376. Its totient is φ = 272514600.

The previous prime is 280084481. The next prime is 280084507. The reversal of 280084487 is 784480082.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 280084487 - 2⁴ = 280084471 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (280084481) 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, 3784889 + ... + 3784962.

It is an arithmetic number, because the mean of its divisors is an integer number (71913594).

Almost surely, 2^280084487 is an apocalyptic number.

280084487 is a deficient number, since it is larger than the sum of its proper divisors (7569889).

280084487 is an equidigital number, since it uses as much as digits as its factorization.

280084487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7569888.

The product of its (nonzero) digits is 114688, while the sum is 41.

The square root of 280084487 is about 16735.7248722605. The cubic root of 280084487 is about 654.2790560347.

The spelling of 280084487 in words is "two hundred eighty million, eighty-four thousand, four hundred eighty-seven".