655278 has 32 divisors (see below), whose sum is σ = 1462272. Its totient is φ = 194400.

The previous prime is 655273. The next prime is 655283. The reversal of 655278 is 872556.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (655273) and next prime (655283).

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 655278.

It is not an unprimeable number, because it can be changed into a prime (655273) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2283 + ... + 2553.

It is an arithmetic number, because the mean of its divisors is an integer number (45696).

2⁶⁵⁵²⁷⁸ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 655278, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (731136).

655278 is an abundant number, since it is smaller than the sum of its proper divisors (806994).

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

655278 is a wasteful number, since it uses less digits than its factorization.

655278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 320.

The product of its digits is 16800, while the sum is 33.

The square root of 655278 is about 809.4924335656. The cubic root of 655278 is about 86.8577408220.

The spelling of 655278 in words is "six hundred fifty-five thousand, two hundred seventy-eight".