39987863808 has 36 divisors (see below), whose sum is σ = 106426035408. Its totient is φ = 13329287680.

The previous prime is 39987863807. The next prime is 39987863831. The reversal of 39987863808 is 80836878993.

It is not an unprimeable number, because it can be changed into a prime (39987863801) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26032998 + ... + 26034533.

Almost surely, 2^39987863808 is an apocalyptic number.

It is an amenable number.

39987863808 is an abundant number, since it is smaller than the sum of its proper divisors (66438171600).

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

39987863808 is an equidigital number, since it uses as much as digits as its factorization.

39987863808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52067550 (or 52067536 counting only the distinct ones).

The product of its (nonzero) digits is 125411328, while the sum is 69.

The spelling of 39987863808 in words is "thirty-nine billion, nine hundred eighty-seven million, eight hundred sixty-three thousand, eight hundred eight".