623956 has 12 divisors (see below), whose sum is σ = 1097460. Its totient is φ = 310400.

The previous prime is 623947. The next prime is 623957. The reversal of 623956 is 659326.

It can be written as a sum of positive squares in 2 ways, for example, as 435600 + 188356 = 660^2 + 434^2 .

It is a nialpdrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (623957) by changing a digit.

623956 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 3 ways as a sum of consecutive naturals, for example, 1356 + ... + 1756.

It is an arithmetic number, because the mean of its divisors is an integer number (91455).

2⁶²³⁹⁵⁶ is an apocalyptic number.

It is an amenable number.

623956 is a deficient number, since it is larger than the sum of its proper divisors (473504).

623956 is a wasteful number, since it uses less digits than its factorization.

623956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 794 (or 792 counting only the distinct ones).

The product of its digits is 9720, while the sum is 31.

The square root of 623956 is about 789.9088555017. The cubic root of 623956 is about 85.4511650720.

The spelling of 623956 in words is "six hundred twenty-three thousand, nine hundred fifty-six".