623900 has 36 divisors (see below), whose sum is σ = 1437408. Its totient is φ = 234240.

The previous prime is 623893. The next prime is 623923. The reversal of 623900 is 9326.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1517 + ... + 1883.

It is an arithmetic number, because the mean of its divisors is an integer number (39928).

2⁶²³⁹⁰⁰ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 623900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (718704).

623900 is an abundant number, since it is smaller than the sum of its proper divisors (813508).

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

623900 is a wasteful number, since it uses less digits than its factorization.

623900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 398 (or 391 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 20.

The square root of 623900 is about 789.8734075787. The cubic root of 623900 is about 85.4486085838.

The spelling of 623900 in words is "six hundred twenty-three thousand, nine hundred".