280248447 has 4 divisors (see below), whose sum is σ = 373664600. Its totient is φ = 186832296.

The previous prime is 280248403. The next prime is 280248469. The reversal of 280248447 is 744842082.

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

It is not a de Polignac number, because 280248447 - 2⁸ = 280248191 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (280248497) 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, 46708072 + ... + 46708077.

It is an arithmetic number, because the mean of its divisors is an integer number (93416150).

Almost surely, 2^280248447 is an apocalyptic number.

280248447 is a deficient number, since it is larger than the sum of its proper divisors (93416153).

280248447 is an equidigital number, since it uses as much as digits as its factorization.

280248447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93416152.

The product of its (nonzero) digits is 114688, while the sum is 39.

The square root of 280248447 is about 16740.6226586707. The cubic root of 280248447 is about 654.4067016476.

The spelling of 280248447 in words is "two hundred eighty million, two hundred forty-eight thousand, four hundred forty-seven".