280198563 has 8 divisors (see below), whose sum is σ = 376286400. Its totient is φ = 185454888.

The previous prime is 280198549. The next prime is 280198613. The reversal of 280198563 is 365891082.

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

It is not a de Polignac number, because 280198563 - 2¹⁰ = 280197539 is a prime.

It is a super-2 number, since 2×280198563² = 157022469414529938, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (280190563) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 335553 + ... + 336386.

It is an arithmetic number, because the mean of its divisors is an integer number (47035800).

Almost surely, 2^280198563 is an apocalyptic number.

280198563 is a deficient number, since it is larger than the sum of its proper divisors (96087837).

280198563 is a wasteful number, since it uses less digits than its factorization.

280198563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 672081.

The product of its (nonzero) digits is 103680, while the sum is 42.

The square root of 280198563 is about 16739.1326836249. The cubic root of 280198563 is about 654.3678713866.

The spelling of 280198563 in words is "two hundred eighty million, one hundred ninety-eight thousand, five hundred sixty-three".