655328 has 12 divisors (see below), whose sum is σ = 1290240. Its totient is φ = 327648.

The previous prime is 655301. The next prime is 655331. The reversal of 655328 is 823556.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 655328.

It is a congruent number.

It is an unprimeable number.

655328 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 as a sum of consecutive naturals, namely, 10208 + ... + 10271.

It is an arithmetic number, because the mean of its divisors is an integer number (107520).

2⁶⁵⁵³²⁸ is an apocalyptic number.

It is an amenable number.

655328 is a deficient number, since it is larger than the sum of its proper divisors (634912).

655328 is a wasteful number, since it uses less digits than its factorization.

655328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20489 (or 20481 counting only the distinct ones).

The product of its digits is 7200, while the sum is 29.

The square root of 655328 is about 809.5233165265. The cubic root of 655328 is about 86.8599499489.

It can be divided in two parts, 655 and 328, that multiplied together give a triangular number (214840 = T₆₅₅).

The spelling of 655328 in words is "six hundred fifty-five thousand, three hundred twenty-eight".