623604 has 24 divisors (see below), whose sum is σ = 1468768. Its totient is φ = 205920.

The previous prime is 623591. The next prime is 623617. The reversal of 623604 is 406326.

623604 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (623591) and next prime (623617).

It is a congruent number.

It is an unprimeable number.

623604 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1719 + ... + 2049.

2⁶²³⁶⁰⁴ is an apocalyptic number.

It is an amenable number.

623604 is an abundant number, since it is smaller than the sum of its proper divisors (845164).

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

623604 is a wasteful number, since it uses less digits than its factorization.

623604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 495 (or 493 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 623604 is about 789.6860135522. The cubic root of 623604 is about 85.4350931758.

The spelling of 623604 in words is "six hundred twenty-three thousand, six hundred four".