623938 has 16 divisors (see below), whose sum is σ = 1096704. Its totient is φ = 260640.

The previous prime is 623933. The next prime is 623947. The reversal of 623938 is 839326.

It is a happy number.

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 (623933) 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 7 ways as a sum of consecutive naturals, for example, 31 + ... + 1117.

It is an arithmetic number, because the mean of its divisors is an integer number (68544).

2⁶²³⁹³⁸ is an apocalyptic number.

623938 is a deficient number, since it is larger than the sum of its proper divisors (472766).

623938 is a wasteful number, since it uses less digits than its factorization.

623938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1137.

The product of its digits is 7776, while the sum is 31.

The square root of 623938 is about 789.8974616999. The cubic root of 623938 is about 85.4503433603.

The spelling of 623938 in words is "six hundred twenty-three thousand, nine hundred thirty-eight".