39189742 has 8 divisors (see below), whose sum is σ = 61878600. Its totient is φ = 18563544.

The previous prime is 39189739. The next prime is 39189779. The reversal of 39189742 is 24798193.

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

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 515617 + ... + 515692.

It is an arithmetic number, because the mean of its divisors is an integer number (7734825).

Almost surely, 2^39189742 is an apocalyptic number.

39189742 is a deficient number, since it is larger than the sum of its proper divisors (22688858).

39189742 is a wasteful number, since it uses less digits than its factorization.

39189742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1031330.

The product of its digits is 108864, while the sum is 43.

The square root of 39189742 is about 6260.1710839241. The cubic root of 39189742 is about 339.6702165617.

The spelling of 39189742 in words is "thirty-nine million, one hundred eighty-nine thousand, seven hundred forty-two".