280430 has 16 divisors (see below), whose sum is σ = 522720. Its totient is φ = 108192.

The previous prime is 280411. The next prime is 280451. The reversal of 280430 is 34082.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 280399 and 280408.

It is a congruent number.

It is an unprimeable number.

280430 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, 194 + ... + 773.

It is an arithmetic number, because the mean of its divisors is an integer number (32670).

2²⁸⁰⁴³⁰ is an apocalyptic number.

280430 is a deficient number, since it is larger than the sum of its proper divisors (242290).

280430 is a wasteful number, since it uses less digits than its factorization.

280430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1003.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 280430 is about 529.5564181464. The cubic root of 280430 is about 65.4547985634.

The spelling of 280430 in words is "two hundred eighty thousand, four hundred thirty".