623838 has 16 divisors (see below), whose sum is σ = 1256976. Its totient is φ = 206400.

The previous prime is 623803. The next prime is 623839. The reversal of 623838 is 838326.

623838 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a d-powerful number, because it can be written as 6² + 2⁵ + 8³ + 3¹⁰ + 3¹² + 8⁵ .

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 (623839) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 738 + ... + 1338.

It is an arithmetic number, because the mean of its divisors is an integer number (78561).

2⁶²³⁸³⁸ is an apocalyptic number.

623838 is an abundant number, since it is smaller than the sum of its proper divisors (633138).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

623838 is a wasteful number, since it uses less digits than its factorization.

623838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 779.

The product of its digits is 6912, while the sum is 30.

The square root of 623838 is about 789.8341598082. The cubic root of 623838 is about 85.4457780077.

The spelling of 623838 in words is "six hundred twenty-three thousand, eight hundred thirty-eight".