39987424040 has 16 divisors (see below), whose sum is σ = 89971704180. Its totient is φ = 15994969600.

The previous prime is 39987424033. The next prime is 39987424129. The reversal of 39987424040 is 4042478993.

It can be written as a sum of positive squares in 2 ways, for example, as 39369702724 + 617721316 = 198418^2 + 24854^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 39987424040.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 499842761 + ... + 499842840.

Almost surely, 2^39987424040 is an apocalyptic number.

It is an amenable number.

39987424040 is an abundant number, since it is smaller than the sum of its proper divisors (49984280140).

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

39987424040 is a wasteful number, since it uses less digits than its factorization.

39987424040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 999685612 (or 999685608 counting only the distinct ones).

The product of its (nonzero) digits is 1741824, while the sum is 50.

The spelling of 39987424040 in words is "thirty-nine billion, nine hundred eighty-seven million, four hundred twenty-four thousand, forty".