23708740 has 72 divisors (see below), whose sum is σ = 55837656. Its totient is φ = 8448000.

The previous prime is 23708723. The next prime is 23708743. The reversal of 23708740 is 4780732.

It can be written as a sum of positive squares in 4 ways, for example, as 7322436 + 16386304 = 2706^2 + 4048^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (23708743) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 234690 + ... + 234790.

It is an arithmetic number, because the mean of its divisors is an integer number (775523).

Almost surely, 2^23708740 is an apocalyptic number.

23708740 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 23708740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27918828).

23708740 is an abundant number, since it is smaller than the sum of its proper divisors (32128916).

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

23708740 is a wasteful number, since it uses less digits than its factorization.

23708740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229 (or 216 counting only the distinct ones).

The product of its (nonzero) digits is 9408, while the sum is 31.

The square root of 23708740 is about 4869.1621455852. The cubic root of 23708740 is about 287.2783016767.

The spelling of 23708740 in words is "twenty-three million, seven hundred eight thousand, seven hundred forty".