655624 has 8 divisors (see below), whose sum is σ = 1229310. Its totient is φ = 327808.

The previous prime is 655601. The next prime is 655637. The reversal of 655624 is 426556.

It can be written as a sum of positive squares in only one way, i.e., 611524 + 44100 = 782^2 + 210^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 655592 and 655601.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40969 + ... + 40984.

2⁶⁵⁵⁶²⁴ is an apocalyptic number.

It is an amenable number.

655624 is a deficient number, since it is larger than the sum of its proper divisors (573686).

655624 is a wasteful number, since it uses less digits than its factorization.

655624 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81959 (or 81955 counting only the distinct ones).

The product of its digits is 7200, while the sum is 28.

The square root of 655624 is about 809.7061195273. The cubic root of 655624 is about 86.8730256784.

The spelling of 655624 in words is "six hundred fifty-five thousand, six hundred twenty-four".