280647472 has 40 divisors (see below), whose sum is σ = 648458496. Its totient is φ = 115046976.

The previous prime is 280647443. The next prime is 280647473. The reversal of 280647472 is 274746082.

280647472 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a plaindrome in base 11.

It is not an unprimeable number, because it can be changed into a prime (280647473) 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 7 ways as a sum of consecutive naturals, for example, 51898 + ... + 57049.

Almost surely, 2^280647472 is an apocalyptic number.

It is an amenable number.

280647472 is an abundant number, since it is smaller than the sum of its proper divisors (367811024).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

280647472 is a wasteful number, since it uses less digits than its factorization.

280647472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108985 (or 108979 counting only the distinct ones).

The product of its (nonzero) digits is 150528, while the sum is 40.

The square root of 280647472 is about 16752.5362855897. The cubic root of 280647472 is about 654.7171414292.

The spelling of 280647472 in words is "two hundred eighty million, six hundred forty-seven thousand, four hundred seventy-two".