280460 has 24 divisors (see below), whose sum is σ = 606480. Its totient is φ = 108864.

The previous prime is 280451. The next prime is 280463. The reversal of 280460 is 64082.

280460 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a d-powerful number, because it can be written as 2⁹ + 8 + 4 + 0 + 6⁷ + 0 .

It is a plaindrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (280463) by changing a digit.

280460 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 551 + ... + 929.

It is an arithmetic number, because the mean of its divisors is an integer number (25270).

2²⁸⁰⁴⁶⁰ is an apocalyptic number.

280460 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 280460, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (303240).

280460 is an abundant number, since it is smaller than the sum of its proper divisors (326020).

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

280460 is a wasteful number, since it uses less digits than its factorization.

280460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 425 (or 423 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 280460 is about 529.5847429827. The cubic root of 280460 is about 65.4571325670.

The spelling of 280460 in words is "two hundred eighty thousand, four hundred sixty".