23723740 has 24 divisors (see below), whose sum is σ = 51539040. Its totient is φ = 9162048.

The previous prime is 23723731. The next prime is 23723743. The reversal of 23723740 is 4732732.

It is a junction number, because it is equal to n+sod(n) for n = 23723699 and 23723708.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23723743) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19872 + ... + 21031.

It is an arithmetic number, because the mean of its divisors is an integer number (2147460).

Almost surely, 2^23723740 is an apocalyptic number.

23723740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23723740 is an abundant number, since it is smaller than the sum of its proper divisors (27815300).

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

23723740 is a wasteful number, since it uses less digits than its factorization.

23723740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40941 (or 40939 counting only the distinct ones).

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

The square root of 23723740 is about 4870.7022081010. The cubic root of 23723740 is about 287.3388737986.

The spelling of 23723740 in words is "twenty-three million, seven hundred twenty-three thousand, seven hundred forty".