280982449 has 6 divisors (see below), whose sum is σ = 308848610. Its totient is φ = 255438480.

The previous prime is 280982447. The next prime is 280982459. The reversal of 280982449 is 944289082.

It can be written as a sum of positive squares in only one way, i.e., 265038400 + 15944049 = 16280^2 + 3993^2 .

It is not a de Polignac number, because 280982449 - 2¹ = 280982447 is a prime.

It is a super-2 number, since 2×280982449² = 157902273292075202, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 280982399 and 280982408.

It is not an unprimeable number, because it can be changed into a prime (280982441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1160964 + ... + 1161205.

Almost surely, 2^280982449 is an apocalyptic number.

It is an amenable number.

280982449 is a deficient number, since it is larger than the sum of its proper divisors (27866161).

280982449 is a wasteful number, since it uses less digits than its factorization.

280982449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2322191 (or 2322180 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 46.

The square root of 280982449 is about 16762.5311036251. The cubic root of 280982449 is about 654.9775250140.

It can be divided in two parts, 2809 and 82449, that added together give a palindrome (85258).

The spelling of 280982449 in words is "two hundred eighty million, nine hundred eighty-two thousand, four hundred forty-nine".