23789640 has 128 divisors (see below), whose sum is σ = 82575360. Its totient is φ = 5370624.

The previous prime is 23789609. The next prime is 23789663. The reversal of 23789640 is 4698732.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 106569 + ... + 106791.

It is an arithmetic number, because the mean of its divisors is an integer number (645120).

Almost surely, 2^23789640 is an apocalyptic number.

23789640 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 23789640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41287680).

23789640 is an abundant number, since it is smaller than the sum of its proper divisors (58785720).

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

23789640 is a wasteful number, since it uses less digits than its factorization.

23789640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 371 (or 367 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 39.

The square root of 23789640 is about 4877.4624550067. The cubic root of 23789640 is about 287.6046852545.

The spelling of 23789640 in words is "twenty-three million, seven hundred eighty-nine thousand, six hundred forty".