3908785500 has 144 divisors (see below), whose sum is σ = 12401625600. Its totient is φ = 1036368000.

The previous prime is 3908785421. The next prime is 3908785541. The reversal of 3908785500 is 55878093.

3908785500 is a `hidden beast` number, since 3 + 90 + 8 + 7 + 8 + 550 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 812101 + ... + 816899.

It is an arithmetic number, because the mean of its divisors is an integer number (86122400).

Almost surely, 2^3908785500 is an apocalyptic number.

3908785500 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 3908785500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6200812800).

3908785500 is an abundant number, since it is smaller than the sum of its proper divisors (8492840100).

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

3908785500 is a wasteful number, since it uses less digits than its factorization.

3908785500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5005 (or 4990 counting only the distinct ones).

The product of its (nonzero) digits is 302400, while the sum is 45.

The square root of 3908785500 is about 62520.2807095426. The cubic root of 3908785500 is about 1575.2419885173.

The spelling of 3908785500 in words is "three billion, nine hundred eight million, seven hundred eighty-five thousand, five hundred".