39915680 has 96 divisors (see below), whose sum is σ = 108936576. Its totient is φ = 13538304.

The previous prime is 39915671. The next prime is 39915697. The reversal of 39915680 is 8651993.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 175727 + ... + 175953.

It is an arithmetic number, because the mean of its divisors is an integer number (1134756).

Almost surely, 2^39915680 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 39915680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (54468288).

39915680 is an abundant number, since it is smaller than the sum of its proper divisors (69020896).

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

39915680 is a wasteful number, since it uses less digits than its factorization.

39915680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 406 (or 398 counting only the distinct ones).

The product of its (nonzero) digits is 58320, while the sum is 41.

The square root of 39915680 is about 6317.8857222967. The cubic root of 39915680 is about 341.7547116607.

The spelling of 39915680 in words is "thirty-nine million, nine hundred fifteen thousand, six hundred eighty".