39908742 has 8 divisors (see below), whose sum is σ = 79817496. Its totient is φ = 13302912.

The previous prime is 39908719. The next prime is 39908747. The reversal of 39908742 is 24780993.

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

39908742 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 39908694 and 39908703.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39908747) 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, 3325723 + ... + 3325734.

It is an arithmetic number, because the mean of its divisors is an integer number (9977187).

Almost surely, 2^39908742 is an apocalyptic number.

39908742 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

39908742 is a wasteful number, since it uses less digits than its factorization.

39908742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6651462.

The product of its (nonzero) digits is 108864, while the sum is 42.

The square root of 39908742 is about 6317.3366223433. The cubic root of 39908742 is about 341.7349096549.

The spelling of 39908742 in words is "thirty-nine million, nine hundred eight thousand, seven hundred forty-two".