280072847 has 4 divisors (see below), whose sum is σ = 281114280. Its totient is φ = 279031416.

The previous prime is 280072843. The next prime is 280072913. The reversal of 280072847 is 748270082.

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 280072847 - 2² = 280072843 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 280072847.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (280072843) 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 3 ways as a sum of consecutive naturals, for example, 520313 + ... + 520850.

It is an arithmetic number, because the mean of its divisors is an integer number (70278570).

Almost surely, 2^280072847 is an apocalyptic number.

280072847 is a deficient number, since it is larger than the sum of its proper divisors (1041433).

280072847 is a wasteful number, since it uses less digits than its factorization.

280072847 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1041432.

The product of its (nonzero) digits is 50176, while the sum is 38.

The square root of 280072847 is about 16735.3771095844. The cubic root of 280072847 is about 654.2699922057.

The spelling of 280072847 in words is "two hundred eighty million, seventy-two thousand, eight hundred forty-seven".