23152440 has 64 divisors (see below), whose sum is σ = 71863200. Its totient is φ = 5960192.

The previous prime is 23152439. The next prime is 23152463. The reversal of 23152440 is 4425132.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 154 + ... + 6806.

Almost surely, 2^23152440 is an apocalyptic number.

23152440 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 23152440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35931600).

23152440 is an abundant number, since it is smaller than the sum of its proper divisors (48710760).

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

23152440 is a wasteful number, since it uses less digits than its factorization.

23152440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6696 (or 6692 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 23152440 is about 4811.6982449027. The cubic root of 23152440 is about 285.0136035366.

Adding to 23152440 its reverse (4425132), we get a palindrome (27577572).

The spelling of 23152440 in words is "twenty-three million, one hundred fifty-two thousand, four hundred forty".