39747842 has 8 divisors (see below), whose sum is σ = 61233276. Its totient is φ = 19336752.

The previous prime is 39747793. The next prime is 39747857. The reversal of 39747842 is 24874793.

It can be written as a sum of positive squares in 2 ways, for example, as 33189121 + 6558721 = 5761^2 + 2561^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 39747793 and 39747802.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 268493 + ... + 268640.

Almost surely, 2^39747842 is an apocalyptic number.

39747842 is a deficient number, since it is larger than the sum of its proper divisors (21485434).

39747842 is a wasteful number, since it uses less digits than its factorization.

39747842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 537172.

The product of its digits is 338688, while the sum is 44.

The square root of 39747842 is about 6304.5889636042. The cubic root of 39747842 is about 341.2750337425.

The spelling of 39747842 in words is "thirty-nine million, seven hundred forty-seven thousand, eight hundred forty-two".