39968784 has 60 divisors (see below), whose sum is σ = 113989356. Its totient is φ = 13069056.

The previous prime is 39968771. The next prime is 39968807. The reversal of 39968784 is 48786993.

It can be written as a sum of positive squares in 2 ways, for example, as 31674384 + 8294400 = 5628^2 + 2880^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 39968784.

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, 5014 + ... + 10250.

Almost surely, 2^39968784 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 39968784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (56994678).

39968784 is an abundant number, since it is smaller than the sum of its proper divisors (74020572).

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

39968784 is a wasteful number, since it uses less digits than its factorization.

39968784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5304 (or 5295 counting only the distinct ones).

The product of its digits is 2612736, while the sum is 54.

The square root of 39968784 is about 6322.0869971869. The cubic root of 39968784 is about 341.9062018341.

The spelling of 39968784 in words is "thirty-nine million, nine hundred sixty-eight thousand, seven hundred eighty-four".