280632 has 32 divisors (see below), whose sum is σ = 766080. Its totient is φ = 84960.

The previous prime is 280627. The next prime is 280639. The reversal of 280632 is 236082.

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

It is a junction number, because it is equal to n+sod(n) for n = 280599 and 280608.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 280632.

It is not an unprimeable number, because it can be changed into a prime (280639) by changing a digit.

280632 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, 268 + ... + 795.

It is an arithmetic number, because the mean of its divisors is an integer number (23940).

2²⁸⁰⁶³² is an apocalyptic number.

280632 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

280632 is an abundant number, since it is smaller than the sum of its proper divisors (485448).

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

280632 is a wasteful number, since it uses less digits than its factorization.

280632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1083 (or 1079 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 280632 is about 529.7471094777. The cubic root of 280632 is about 65.4705109763.

The spelling of 280632 in words is "two hundred eighty thousand, six hundred thirty-two".