39687742 has 8 divisors (see below), whose sum is σ = 62120016. Its totient is φ = 18981072.

The previous prime is 39687733. The next prime is 39687749. The reversal of 39687742 is 24778693.

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

It is a Harshad number since it is a multiple of its sum of digits (46), and also a Moran number because the ratio is a prime number: 862777 = 39687742 / (3 + 9 + 6 + 8 + 7 + 7 + 4 + 2).

It is a junction number, because it is equal to n+sod(n) for n = 39687692 and 39687701.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39687749) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 431343 + ... + 431434.

It is an arithmetic number, because the mean of its divisors is an integer number (7765002).

Almost surely, 2^39687742 is an apocalyptic number.

39687742 is a deficient number, since it is larger than the sum of its proper divisors (22432274).

39687742 is a wasteful number, since it uses less digits than its factorization.

39687742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 862802.

The product of its digits is 508032, while the sum is 46.

The square root of 39687742 is about 6299.8207911019. The cubic root of 39687742 is about 341.1029407452.

The spelling of 39687742 in words is "thirty-nine million, six hundred eighty-seven thousand, seven hundred forty-two".