23239742 has 4 divisors (see below), whose sum is σ = 34859616. Its totient is φ = 11619870.

The previous prime is 23239703. The next prime is 23239747. The reversal of 23239742 is 24793232.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 23239699 and 23239708.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23239747) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5809934 + ... + 5809937.

It is an arithmetic number, because the mean of its divisors is an integer number (8714904).

Almost surely, 2^23239742 is an apocalyptic number.

23239742 is a deficient number, since it is larger than the sum of its proper divisors (11619874).

23239742 is a wasteful number, since it uses less digits than its factorization.

23239742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11619873.

The product of its digits is 18144, while the sum is 32.

The square root of 23239742 is about 4820.7615580943. The cubic root of 23239742 is about 285.3713922918.

The spelling of 23239742 in words is "twenty-three million, two hundred thirty-nine thousand, seven hundred forty-two".