280328247 has 12 divisors (see below), whose sum is σ = 406224624. Its totient is φ = 186282720.

The previous prime is 280328233. The next prime is 280328287. The reversal of 280328247 is 742823082.

It is not a de Polignac number, because 280328247 - 2⁸ = 280327991 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (280328207) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 47278 + ... + 52875.

It is an arithmetic number, because the mean of its divisors is an integer number (33852052).

Almost surely, 2^280328247 is an apocalyptic number.

280328247 is a deficient number, since it is larger than the sum of its proper divisors (125896377).

280328247 is a wasteful number, since it uses less digits than its factorization.

280328247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100470 (or 100467 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 36.

The square root of 280328247 is about 16743.0059129178. The cubic root of 280328247 is about 654.4688092756.

The spelling of 280328247 in words is "two hundred eighty million, three hundred twenty-eight thousand, two hundred forty-seven".