280320197 has 8 divisors (see below), whose sum is σ = 289834752. Its totient is φ = 270835200.

The previous prime is 280320169. The next prime is 280320217. The reversal of 280320197 is 791023082.

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 280320197 - 2²⁰ = 279271621 is a prime.

It is a super-2 number, since 2×280320197² = 157158825692237618, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (280320137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12818 + ... + 26924.

It is an arithmetic number, because the mean of its divisors is an integer number (36229344).

Almost surely, 2^280320197 is an apocalyptic number.

It is an amenable number.

280320197 is a deficient number, since it is larger than the sum of its proper divisors (9514555).

280320197 is a wasteful number, since it uses less digits than its factorization.

280320197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14779.

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 280320197 is about 16742.7655123041. The cubic root of 280320197 is about 654.4625445670.

The spelling of 280320197 in words is "two hundred eighty million, three hundred twenty thousand, one hundred ninety-seven".