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23442 = 233907

23442 has 8 divisors (see below), whose sum is σ = 46896. Its totient is φ = 7812.

The previous prime is 23431. The next prime is 23447. The reversal of 23442 is 24432.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

23442 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (23447) by changing a digit.

23442 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, 1948 + ... + 1959.

It is an arithmetic number, because the mean of its divisors is an integer number (5862).

223442 is an apocalyptic number.

23442 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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 (23448).

23442 is a wasteful number, since it uses less digits than its factorization.

23442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3912.

The product of its digits is 192, while the sum is 15.

The square root of 23442 is about 153.1078051570. The cubic root of 23442 is about 28.6196874894.

Adding to 23442 its reverse (24432), we get a palindrome (47874).

Subtracting 23442 from its reverse (24432), we obtain a triangular number (990 = T44).

It can be divided in two parts, 2344 and 2, that added together give a triangular number (2346 = T68).

The spelling of 23442 in words is "twenty-three thousand, four hundred forty-two", and thus it is an iban number.

Divisors: 1 2 3 6 3907 7814 11721 23442