23252640 has 96 divisors (see below), whose sum is σ = 73918656. Its totient is φ = 6144000.

The previous prime is 23252611. The next prime is 23252653. The reversal of 23252640 is 4625232.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 23252640.

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, 92515 + ... + 92765.

It is an arithmetic number, because the mean of its divisors is an integer number (769986).

Almost surely, 2^23252640 is an apocalyptic number.

23252640 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 23252640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36959328).

23252640 is an abundant number, since it is smaller than the sum of its proper divisors (50666016).

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

23252640 is a wasteful number, since it uses less digits than its factorization.

23252640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 462 (or 454 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 24.

The square root of 23252640 is about 4822.0991279732. The cubic root of 23252640 is about 285.4241760031.

Adding to 23252640 its reverse (4625232), we get a palindrome (27877872).

The spelling of 23252640 in words is "twenty-three million, two hundred fifty-two thousand, six hundred forty".