280864315 has 4 divisors (see below), whose sum is σ = 337037184. Its totient is φ = 224691448.

The previous prime is 280864307. The next prime is 280864319. The reversal of 280864315 is 513468082.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 280864315 - 2³ = 280864307 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (280864319) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28086427 + ... + 28086436.

It is an arithmetic number, because the mean of its divisors is an integer number (84259296).

Almost surely, 2^280864315 is an apocalyptic number.

280864315 is a deficient number, since it is larger than the sum of its proper divisors (56172869).

280864315 is an equidigital number, since it uses as much as digits as its factorization.

280864315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56172868.

The product of its (nonzero) digits is 46080, while the sum is 37.

The square root of 280864315 is about 16759.0069813220. The cubic root of 280864315 is about 654.8857209869.

The spelling of 280864315 in words is "two hundred eighty million, eight hundred sixty-four thousand, three hundred fifteen".