23661552 has 80 divisors (see below), whose sum is σ = 65567232. Its totient is φ = 7326720.

The previous prime is 23661529. The next prime is 23661559. The reversal of 23661552 is 25516632.

Its product of digits (10800) is a multiple of the sum of its prime divisors (400).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23661559) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 87177 + ... + 87447.

Almost surely, 2^23661552 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 23661552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32783616).

23661552 is an abundant number, since it is smaller than the sum of its proper divisors (41905680).

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

23661552 is a wasteful number, since it uses less digits than its factorization.

23661552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 406 (or 400 counting only the distinct ones).

The product of its digits is 10800, while the sum is 30.

The square root of 23661552 is about 4864.3141345929. The cubic root of 23661552 is about 287.0875830906.

The spelling of 23661552 in words is "twenty-three million, six hundred sixty-one thousand, five hundred fifty-two".