39168742 has 4 divisors (see below), whose sum is σ = 58753116. Its totient is φ = 19584370.

The previous prime is 39168713. The next prime is 39168751. The reversal of 39168742 is 24786193.

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

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 39168695 and 39168704.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9792184 + ... + 9792187.

It is an arithmetic number, because the mean of its divisors is an integer number (14688279).

Almost surely, 2^39168742 is an apocalyptic number.

39168742 is a deficient number, since it is larger than the sum of its proper divisors (19584374).

39168742 is a wasteful number, since it uses less digits than its factorization.

39168742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19584373.

The product of its digits is 72576, while the sum is 40.

The square root of 39168742 is about 6258.4935887161. The cubic root of 39168742 is about 339.6095344490.

The spelling of 39168742 in words is "thirty-nine million, one hundred sixty-eight thousand, seven hundred forty-two".