23743720 has 128 divisors (see below), whose sum is σ = 71850240. Its totient is φ = 6819840.

The previous prime is 23743717. The next prime is 23743723. The reversal of 23743720 is 2734732.

It is an interprime number because it is at equal distance from previous prime (23743717) and next prime (23743723).

It is a Harshad number since it is a multiple of its sum of digits (28).

It is not an unprimeable number, because it can be changed into a prime (23743723) 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, 39744 + ... + 40336.

It is an arithmetic number, because the mean of its divisors is an integer number (561330).

Almost surely, 2^23743720 is an apocalyptic number.

23743720 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 23743720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35925120).

23743720 is an abundant number, since it is smaller than the sum of its proper divisors (48106520).

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

23743720 is a wasteful number, since it uses less digits than its factorization.

23743720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 635 (or 631 counting only the distinct ones).

The product of its (nonzero) digits is 7056, while the sum is 28.

The square root of 23743720 is about 4872.7528154012. The cubic root of 23743720 is about 287.4195162235.

The spelling of 23743720 in words is "twenty-three million, seven hundred forty-three thousand, seven hundred twenty".