23536440 has 256 divisors, whose sum is σ = 87552000. Its totient is φ = 5598720.

The previous prime is 23536433. The next prime is 23536451. The reversal of 23536440 is 4463532.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 636102 + ... + 636138.

It is an arithmetic number, because the mean of its divisors is an integer number (342000).

Almost surely, 2^23536440 is an apocalyptic number.

23536440 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 23536440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43776000).

23536440 is an abundant number, since it is smaller than the sum of its proper divisors (64015560).

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

23536440 is a wasteful number, since it uses less digits than its factorization.

23536440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107 (or 97 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 27.

The square root of 23536440 is about 4851.4369005481. The cubic root of 23536440 is about 286.5806905200.

Adding to 23536440 its reverse (4463532), we get a palindrome (27999972).

The spelling of 23536440 in words is "twenty-three million, five hundred thirty-six thousand, four hundred forty".