280065099 has 16 divisors (see below), whose sum is σ = 386551808. Its totient is φ = 180224352.

The previous prime is 280065083. The next prime is 280065131. The reversal of 280065099 is 990560082.

It is a happy number.

It is not a de Polignac number, because 280065099 - 2⁴ = 280065083 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (280065059) 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 15 ways as a sum of consecutive naturals, for example, 4164 + ... + 24030.

It is an arithmetic number, because the mean of its divisors is an integer number (24159488).

Almost surely, 2^280065099 is an apocalyptic number.

280065099 is a deficient number, since it is larger than the sum of its proper divisors (106486709).

280065099 is a wasteful number, since it uses less digits than its factorization.

280065099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20034.

The product of its (nonzero) digits is 38880, while the sum is 39.

The square root of 280065099 is about 16735.1456223123. The cubic root of 280065099 is about 654.2639588580.

The spelling of 280065099 in words is "two hundred eighty million, sixty-five thousand, ninety-nine".