623994 has 32 divisors (see below), whose sum is σ = 1451520. Its totient is φ = 175152.

The previous prime is 623989. The next prime is 624007. The reversal of 623994 is 499326.

623994 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3397 + ... + 3575.

It is an arithmetic number, because the mean of its divisors is an integer number (45360).

2⁶²³⁹⁹⁴ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 623994, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (725760).

623994 is an abundant number, since it is smaller than the sum of its proper divisors (827526).

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

623994 is a wasteful number, since it uses less digits than its factorization.

623994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 274.

The product of its digits is 11664, while the sum is 33.

The square root of 623994 is about 789.9329085435. The cubic root of 623994 is about 85.4528997447.

The spelling of 623994 in words is "six hundred twenty-three thousand, nine hundred ninety-four".