23841520 has 40 divisors (see below), whose sum is σ = 56487456. Its totient is φ = 9355008.

The previous prime is 23841473. The next prime is 23841527. The reversal of 23841520 is 2514832.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23841527) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1429 + ... + 7051.

Almost surely, 2^23841520 is an apocalyptic number.

23841520 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 23841520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28243728).

23841520 is an abundant number, since it is smaller than the sum of its proper divisors (32645936).

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

23841520 is a wasteful number, since it uses less digits than its factorization.

23841520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5689 (or 5683 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 23841520 is about 4882.7778978774. Note that the first 3 decimals coincide. The cubic root of 23841520 is about 287.8136010930.

The spelling of 23841520 in words is "twenty-three million, eight hundred forty-one thousand, five hundred twenty".