655798 has 16 divisors (see below), whose sum is σ = 1156176. Its totient is φ = 275040.

The previous prime is 655757. The next prime is 655807. The reversal of 655798 is 897556.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 655798.

It is a congruent number.

It is an unprimeable number.

655798 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, 861 + ... + 1432.

It is an arithmetic number, because the mean of its divisors is an integer number (72261).

2⁶⁵⁵⁷⁹⁸ is an apocalyptic number.

655798 is a deficient number, since it is larger than the sum of its proper divisors (500378).

655798 is a wasteful number, since it uses less digits than its factorization.

655798 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2319.

The product of its digits is 75600, while the sum is 40.

The square root of 655798 is about 809.8135587899. The cubic root of 655798 is about 86.8807102504.

The spelling of 655798 in words is "six hundred fifty-five thousand, seven hundred ninety-eight".