423656 has 8 divisors (see below), whose sum is σ = 794370. Its totient is φ = 211824.

The previous prime is 423649. The next prime is 423667. The reversal of 423656 is 656324.

It can be written as a sum of positive squares in only one way, i.e., 422500 + 1156 = 650^2 + 34^2 .

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

It is a plaindrome in base 13.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26471 + ... + 26486.

2⁴²³⁶⁵⁶ is an apocalyptic number.

It is an amenable number.

423656 is a deficient number, since it is larger than the sum of its proper divisors (370714).

423656 is a wasteful number, since it uses less digits than its factorization.

423656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52963 (or 52959 counting only the distinct ones).

The product of its digits is 4320, while the sum is 26.

The square root of 423656 is about 650.8886233450. Note that the first 3 decimals coincide. The cubic root of 423656 is about 75.1053925701.

The spelling of 423656 in words is "four hundred twenty-three thousand, six hundred fifty-six".