23751640 has 64 divisors (see below), whose sum is σ = 60860160. Its totient is φ = 8257920.

The previous prime is 23751613. The next prime is 23751641. The reversal of 23751640 is 4615732.

It is a junction number, because it is equal to n+sod(n) for n = 23751599 and 23751608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23751641) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8947 + ... + 11293.

It is an arithmetic number, because the mean of its divisors is an integer number (950940).

Almost surely, 2^23751640 is an apocalyptic number.

23751640 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 23751640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30430080).

23751640 is an abundant number, since it is smaller than the sum of its proper divisors (37108520).

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

23751640 is a wasteful number, since it uses less digits than its factorization.

23751640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2392 (or 2388 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 28.

The square root of 23751640 is about 4873.5654299496. The cubic root of 23751640 is about 287.4514700695.

The spelling of 23751640 in words is "twenty-three million, seven hundred fifty-one thousand, six hundred forty".