23234640 has 160 divisors (see below), whose sum is σ = 84744576. Its totient is φ = 5191680.

The previous prime is 23234633. The next prime is 23234641. The reversal of 23234640 is 4643232.

It is a happy number.

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 23234640.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23234641) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 33982 + ... + 34658.

Almost surely, 2^23234640 is an apocalyptic number.

23234640 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 23234640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42372288).

23234640 is an abundant number, since it is smaller than the sum of its proper divisors (61509936).

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

23234640 is a wasteful number, since it uses less digits than its factorization.

23234640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 717 (or 711 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 24.

The square root of 23234640 is about 4820.2323595445. The cubic root of 23234640 is about 285.3505075017.

Adding to 23234640 its reverse (4643232), we get a palindrome (27877872).

The spelling of 23234640 in words is "twenty-three million, two hundred thirty-four thousand, six hundred forty".