280984161 has 8 divisors (see below), whose sum is σ = 387564480. Its totient is φ = 180863312.

The previous prime is 280984153. The next prime is 280984181. The reversal of 280984161 is 161489082.

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

It is a cyclic number.

It is not a de Polignac number, because 280984161 - 2³ = 280984153 is a prime.

It is not an unprimeable number, because it can be changed into a prime (280984181) 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, 1614765 + ... + 1614938.

It is an arithmetic number, because the mean of its divisors is an integer number (48445560).

Almost surely, 2^280984161 is an apocalyptic number.

It is an amenable number.

280984161 is a deficient number, since it is larger than the sum of its proper divisors (106580319).

280984161 is a wasteful number, since it uses less digits than its factorization.

280984161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3229735.

The product of its (nonzero) digits is 27648, while the sum is 39.

The square root of 280984161 is about 16762.5821698210. The cubic root of 280984161 is about 654.9788552504.

The spelling of 280984161 in words is "two hundred eighty million, nine hundred eighty-four thousand, one hundred sixty-one".