280045465 has 16 divisors (see below), whose sum is σ = 404277120. Its totient is φ = 181923840.

The previous prime is 280045463. The next prime is 280045477. The reversal of 280045465 is 564540082.

It is not a de Polignac number, because 280045465 - 2¹ = 280045463 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 280045465.

It is not an unprimeable number, because it can be changed into a prime (280045463) 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, 209896 + ... + 211225.

It is an arithmetic number, because the mean of its divisors is an integer number (25267320).

Almost surely, 2^280045465 is an apocalyptic number.

It is an amenable number.

280045465 is a deficient number, since it is larger than the sum of its proper divisors (124231655).

280045465 is a wasteful number, since it uses less digits than its factorization.

280045465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 421152.

The product of its (nonzero) digits is 38400, while the sum is 34.

The square root of 280045465 is about 16734.5590022564. The cubic root of 280045465 is about 654.2486694142.

The spelling of 280045465 in words is "two hundred eighty million, forty-five thousand, four hundred sixty-five".