280452 has 12 divisors (see below), whose sum is σ = 654416. Its totient is φ = 93480.

The previous prime is 280451. The next prime is 280463. The reversal of 280452 is 254082.

It is a tau number, because it is divible by the number of its divisors (12).

It is a hoax number, since the sum of its digits (21) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (280451) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 11674 + ... + 11697.

2²⁸⁰⁴⁵² is an apocalyptic number.

It is an amenable number.

280452 is an abundant number, since it is smaller than the sum of its proper divisors (373964).

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

280452 is a wasteful number, since it uses less digits than its factorization.

280452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23378 (or 23376 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 280452 is about 529.5771898411. The cubic root of 280452 is about 65.4565101823.

The spelling of 280452 in words is "two hundred eighty thousand, four hundred fifty-two".