623630 has 32 divisors (see below), whose sum is σ = 1313280.
Its totient is φ = 208800.
The previous prime is 623621. The next prime is 623633. The reversal of 623630 is 36326.
It is a happy number.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (623633) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (7) of ones.
It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4055 + ... + 4205.
It is an arithmetic number, because the mean of its divisors is an integer number (41040).
2623630 is an apocalyptic number.
623630 is an abundant number, since it is smaller than the sum of its proper divisors (689650).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
623630 is a wasteful number, since it uses less digits than its factorization.
623630 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 224.
The product of its (nonzero) digits is 648, while the sum is 20.
The square root of 623630 is about 789.7024756198.
The cubic root of 623630 is about 85.4362805113.
Adding to 623630 its reverse (36326), we get a palindrome (659956).
The spelling of 623630 in words is "six hundred twenty-three thousand, six hundred thirty".