280052805 has 8 divisors (see below), whose sum is σ = 448084512. Its totient is φ = 149361488.

The previous prime is 280052771. The next prime is 280052809. The reversal of 280052805 is 508250082.

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 280052805 - 2⁹ = 280052293 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (280052809) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9335079 + ... + 9335108.

It is an arithmetic number, because the mean of its divisors is an integer number (56010564).

Almost surely, 2^280052805 is an apocalyptic number.

It is an amenable number.

280052805 is a deficient number, since it is larger than the sum of its proper divisors (168031707).

280052805 is a wasteful number, since it uses less digits than its factorization.

280052805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18670195.

The product of its (nonzero) digits is 6400, while the sum is 30.

The square root of 280052805 is about 16734.7783074650. The cubic root of 280052805 is about 654.2543853233.

The spelling of 280052805 in words is "two hundred eighty million, fifty-two thousand, eight hundred five".