655280 has 20 divisors (see below), whose sum is σ = 1523712. Its totient is φ = 262080.

The previous prime is 655273. The next prime is 655283. The reversal of 655280 is 82556.

It is a tau number, because it is divible by the number of its divisors (20).

It is a hoax number, since the sum of its digits (26) coincides with the sum of the digits of its distinct prime factors.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 655280.

It is not an unprimeable number, because it can be changed into a prime (655283) by changing a digit.

655280 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4016 + ... + 4175.

2⁶⁵⁵²⁸⁰ is an apocalyptic number.

It is an amenable number.

655280 is an abundant number, since it is smaller than the sum of its proper divisors (868432).

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

655280 is a wasteful number, since it uses less digits than its factorization.

655280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8204 (or 8198 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 655280 is about 809.4936689067. The cubic root of 655280 is about 86.8578291893.

The spelling of 655280 in words is "six hundred fifty-five thousand, two hundred eighty".