39999680 has 84 divisors (see below), whose sum is σ = 110843568. Its totient is φ = 13708800.

The previous prime is 39999677. The next prime is 39999709. The reversal of 39999680 is 8699993.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14405 + ... + 16955.

Almost surely, 2^39999680 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 39999680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (55421784).

39999680 is an abundant number, since it is smaller than the sum of its proper divisors (70843888).

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

39999680 is a wasteful number, since it uses less digits than its factorization.

39999680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2582 (or 2565 counting only the distinct ones).

The product of its (nonzero) digits is 944784, while the sum is 53.

The square root of 39999680 is about 6324.5300220649. The cubic root of 39999680 is about 341.9942773457.

The spelling of 39999680 in words is "thirty-nine million, nine hundred ninety-nine thousand, six hundred eighty".