280696516 has 9 divisors (see below), whose sum is σ = 491277549. Its totient is φ = 140331504.

The previous prime is 280696511. The next prime is 280696517. The reversal of 280696516 is 615696082.

The square root of 280696516 is 16754.

It is a perfect power (a square), and thus also a powerful number.

280696516 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 40322500 + 240374016 = 6350^2 + 15504^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (280696511) 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 2 ways as a sum of consecutive naturals, for example, 29320 + ... + 37696.

Almost surely, 2^280696516 is an apocalyptic number.

280696516 is the 16754-th square number.

It is an amenable number.

280696516 is a deficient number, since it is larger than the sum of its proper divisors (210581033).

280696516 is an frugal number, since it uses more digits than its factorization.

280696516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16758 (or 8379 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 43.

The cubic root of 280696516 is about 654.7552771456.

The spelling of 280696516 in words is "two hundred eighty million, six hundred ninety-six thousand, five hundred sixteen".