280626 has 8 divisors (see below), whose sum is σ = 561264. Its totient is φ = 93540.

The previous prime is 280613. The next prime is 280627. The reversal of 280626 is 626082.

It is a sphenic number, since it is the product of 3 distinct primes.

280626 is an admirable number.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 280596 and 280605.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 280626.

It is not an unprimeable number, because it can be changed into a prime (280627) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23380 + ... + 23391.

It is an arithmetic number, because the mean of its divisors is an integer number (70158).

2²⁸⁰⁶²⁶ is an apocalyptic number.

280626 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

280626 is a wasteful number, since it uses less digits than its factorization.

280626 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46776.

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 280626 is about 529.7414463679. The cubic root of 280626 is about 65.4700443797.

The spelling of 280626 in words is "two hundred eighty thousand, six hundred twenty-six".