623866 has 16 divisors (see below), whose sum is σ = 1010880. Its totient is φ = 287680.

The previous prime is 623851. The next prime is 623867. The reversal of 623866 is 668326.

623866 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (623867) 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, 1851 + ... + 2161.

It is an arithmetic number, because the mean of its divisors is an integer number (63180).

2⁶²³⁸⁶⁶ is an apocalyptic number.

623866 is a deficient number, since it is larger than the sum of its proper divisors (387014).

623866 is a wasteful number, since it uses less digits than its factorization.

623866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 389.

The product of its digits is 10368, while the sum is 31.

The square root of 623866 is about 789.8518848493. The cubic root of 623866 is about 85.4470563556.

The spelling of 623866 in words is "six hundred twenty-three thousand, eight hundred sixty-six".