280260 has 60 divisors (see below), whose sum is σ = 884268. Its totient is φ = 74304.

The previous prime is 280253. The next prime is 280277. The reversal of 280260 is 62082.

It can be written as a sum of positive squares in 2 ways, for example, as 186624 + 93636 = 432^2 + 306^2 .

It is a tau number, because it is divible by the number of its divisors (60).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a d-powerful number, because it can be written as 2² + 8² + 2⁸ + 0 + 6⁷ + 0 .

It is an unprimeable number.

280260 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1534 + ... + 1706.

2²⁸⁰²⁶⁰ is an apocalyptic number.

280260 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 280260, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (442134).

280260 is an abundant number, since it is smaller than the sum of its proper divisors (604008).

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

280260 is a wasteful number, since it uses less digits than its factorization.

280260 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194 (or 183 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 280260 is about 529.3958821147. The cubic root of 280260 is about 65.4415693974.

The spelling of 280260 in words is "two hundred eighty thousand, two hundred sixty".