23609940 has 96 divisors (see below), whose sum is σ = 71124480. Its totient is φ = 5830656.

The previous prime is 23609939. The next prime is 23609977. The reversal of 23609940 is 4990632.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 80434 + ... + 80726.

It is an arithmetic number, because the mean of its divisors is an integer number (740880).

Almost surely, 2^23609940 is an apocalyptic number.

23609940 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 23609940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35562240).

23609940 is an abundant number, since it is smaller than the sum of its proper divisors (47514540).

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

23609940 is a wasteful number, since it uses less digits than its factorization.

23609940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 401 (or 399 counting only the distinct ones).

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

The square root of 23609940 is about 4859.0060712043. The cubic root of 23609940 is about 286.8786935698.

The spelling of 23609940 in words is "twenty-three million, six hundred nine thousand, nine hundred forty".