655800 has 48 divisors (see below), whose sum is σ = 2034840. Its totient is φ = 174720.

The previous prime is 655757. The next prime is 655807. The reversal of 655800 is 8556.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (655807) 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 11 ways as a sum of consecutive naturals, for example, 54 + ... + 1146.

2⁶⁵⁵⁸⁰⁰ is an apocalyptic number.

655800 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 655800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1017420).

655800 is an abundant number, since it is smaller than the sum of its proper divisors (1379040).

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

655800 is a wasteful number, since it uses less digits than its factorization.

655800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1112 (or 1103 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 24.

The square root of 655800 is about 809.8147936411. The cubic root of 655800 is about 86.8807985709.

The spelling of 655800 in words is "six hundred fifty-five thousand, eight hundred".