280048329 has 18 divisors (see below), whose sum is σ = 444633098. Its totient is φ = 169725600.

The previous prime is 280048319. The next prime is 280048333. The reversal of 280048329 is 923840082.

It can be written as a sum of positive squares in only one way, i.e., 214681104 + 65367225 = 14652^2 + 8085^2 .

It is not a de Polignac number, because 280048329 - 2⁴ = 280048313 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 280048293 and 280048302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (280048319) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 127492 + ... + 129669.

Almost surely, 2^280048329 is an apocalyptic number.

It is an amenable number.

280048329 is a deficient number, since it is larger than the sum of its proper divisors (164584769).

280048329 is a wasteful number, since it uses less digits than its factorization.

280048329 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257189 (or 257175 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The square root of 280048329 is about 16734.6445734590. The cubic root of 280048329 is about 654.2508997208.

The spelling of 280048329 in words is "two hundred eighty million, forty-eight thousand, three hundred twenty-nine".