39688871040 has 1152 divisors, whose sum is σ = 178086308400. Its totient is φ = 8063483904.

The previous prime is 39688871039. The next prime is 39688871081. The reversal of 39688871040 is 4017888693.

It can be written as a sum of positive squares in 8 ways, for example, as 10954552896 + 28734318144 = 104664^2 + 169512^2 .

It is a tau number, because it is divible by the number of its divisors (1152).

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 106404294 + ... + 106404666.

Almost surely, 2^39688871040 is an apocalyptic number.

39688871040 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 39688871040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89043154200).

39688871040 is an abundant number, since it is smaller than the sum of its proper divisors (138397437360).

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

39688871040 is a wasteful number, since it uses less digits than its factorization.

39688871040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 454 (or 432 counting only the distinct ones).

The product of its (nonzero) digits is 2322432, while the sum is 54.

The spelling of 39688871040 in words is "thirty-nine billion, six hundred eighty-eight million, eight hundred seventy-one thousand, forty".