39987108 has 96 divisors (see below), whose sum is σ = 120126720. Its totient is φ = 11407392.

The previous prime is 39987107. The next prime is 39987109. The reversal of 39987108 is 80178993.

It is an interprime number because it is at equal distance from previous prime (39987107) and next prime (39987109).

It is not an unprimeable number, because it can be changed into a prime (39987107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 60910 + ... + 61562.

It is an arithmetic number, because the mean of its divisors is an integer number (1251320).

Almost surely, 2^39987108 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 39987108, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (60063360).

39987108 is an abundant number, since it is smaller than the sum of its proper divisors (80139612).

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

39987108 is an equidigital number, since it uses as much as digits as its factorization.

39987108 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 685 (or 665 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 45.

The square root of 39987108 is about 6323.5360361114. The cubic root of 39987108 is about 341.9584437042.

The spelling of 39987108 in words is "thirty-nine million, nine hundred eighty-seven thousand, one hundred eight".