623944 has 16 divisors (see below), whose sum is σ = 1221120. Its totient is φ = 298320.

The previous prime is 623933. The next prime is 623947. The reversal of 623944 is 449326.

It is a super-2 number, since 2×623944² = 778612230272, which contains 22 as substring.

It is a plaindrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (623947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1512 + ... + 1879.

It is an arithmetic number, because the mean of its divisors is an integer number (76320).

2⁶²³⁹⁴⁴ is an apocalyptic number.

It is an amenable number.

623944 is a deficient number, since it is larger than the sum of its proper divisors (597176).

623944 is a wasteful number, since it uses less digits than its factorization.

623944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3420 (or 3416 counting only the distinct ones).

The product of its digits is 5184, while the sum is 28.

The square root of 623944 is about 789.9012596521. The cubic root of 623944 is about 85.4506172660.

The spelling of 623944 in words is "six hundred twenty-three thousand, nine hundred forty-four".