3989987750 has 32 divisors (see below), whose sum is σ = 8536297536. Its totient is φ = 1367995200.

The previous prime is 3989987741. The next prime is 3989987753. The reversal of 3989987750 is 577899893.

It is a Smith number, since the sum of its digits (65) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3989987753) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1138247 + ... + 1141746.

It is an arithmetic number, because the mean of its divisors is an integer number (266759298).

Almost surely, 2^3989987750 is an apocalyptic number.

3989987750 is an abundant number, since it is smaller than the sum of its proper divisors (4546309786).

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

3989987750 is a wasteful number, since it uses less digits than its factorization.

3989987750 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2280017 (or 2280007 counting only the distinct ones).

The product of its (nonzero) digits is 34292160, while the sum is 65.

The square root of 3989987750 is about 63166.3498233039. The cubic root of 3989987750 is about 1586.0754906828.

The spelling of 3989987750 in words is "three billion, nine hundred eighty-nine million, nine hundred eighty-seven thousand, seven hundred fifty".