39870916 has 24 divisors (see below), whose sum is σ = 74342016. Its totient is φ = 18645120.

The previous prime is 39870889. The next prime is 39870917. The reversal of 39870916 is 61907893.

It is not an unprimeable number, because it can be changed into a prime (39870917) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9601 + ... + 13111.

It is an arithmetic number, because the mean of its divisors is an integer number (3097584).

Almost surely, 2^39870916 is an apocalyptic number.

It is an amenable number.

39870916 is a deficient number, since it is larger than the sum of its proper divisors (34471100).

39870916 is a wasteful number, since it uses less digits than its factorization.

39870916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3699 (or 3697 counting only the distinct ones).

The product of its (nonzero) digits is 81648, while the sum is 43.

The square root of 39870916 is about 6314.3420876604. The cubic root of 39870916 is about 341.6269086661.

The spelling of 39870916 in words is "thirty-nine million, eight hundred seventy thousand, nine hundred sixteen".