It is a happy number.
It is a harmonic number, since the harmonic mean of its divisors is an integer.
It is a congruent number.
Almost surely, 223963940 is an apocalyptic number.
23963940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 23963940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (52284960).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
23963940 is a wasteful number, since it uses less digits than its factorization.
23963940 is an evil number, because the sum of its binary digits is even.
The square root of 23963940 is about 4895.2977437537. The cubic root of 23963940 is about 288.3053763160.
The spelling of 23963940 in words is "twenty-three million, nine hundred sixty-three thousand, nine hundred forty".