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23740 = 2251187

23740 has 12 divisors (see below), whose sum is σ = 49896. Its totient is φ = 9488.

The previous prime is 23719. The next prime is 23741. The reversal of 23740 is 4732.

23740 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

23740 is strictly pandigital in base 6.

It is a nialpdrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23741) by changing a digit.

23740 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 574 + ... + 613.

It is an arithmetic number, because the mean of its divisors is an integer number (4158).

223740 is an apocalyptic number.

23740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23740 is an abundant number, since it is smaller than the sum of its proper divisors (26156).

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

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24948).

23740 is a wasteful number, since it uses less digits than its factorization.

23740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1196 (or 1194 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 16.

The square root of 23740 is about 154.0779023741. The cubic root of 23740 is about 28.7404505146.

It can be divided in two parts, 23 and 740, that multiplied together give a triangular number (17020 = T184).

The spelling of 23740 in words is "twenty-three thousand, seven hundred forty", and thus it is an iban number.

Divisors: 1 2 4 5 10 20 1187 2374 4748 5935 11870 23740