923638 has 4 divisors (see below), whose sum is σ = 1385460. Its totient is φ = 461818.

The previous prime is 923617. The next prime is 923641. The reversal of 923638 is 836329.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 836329 = 13 ⋅64333.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 230908 + ... + 230911.

It is an arithmetic number, because the mean of its divisors is an integer number (346365).

2⁹²³⁶³⁸ is an apocalyptic number.

923638 is a deficient number, since it is larger than the sum of its proper divisors (461822).

923638 is a wasteful number, since it uses less digits than its factorization.

923638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 461821.

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

The square root of 923638 is about 961.0608721616. The cubic root of 923638 is about 97.3869124954.

The spelling of 923638 in words is "nine hundred twenty-three thousand, six hundred thirty-eight".