3985941999 has 64 divisors (see below), whose sum is σ = 6134768640. Its totient is φ = 2281789440.

The previous prime is 3985941937. The next prime is 3985942003. The reversal of 3985941999 is 9991495893.

It is not a de Polignac number, because 3985941999 - 2²¹ = 3983844847 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3985941299) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 15155542 + ... + 15155804.

It is an arithmetic number, because the mean of its divisors is an integer number (95855760).

Almost surely, 2^3985941999 is an apocalyptic number.

3985941999 is a gapful number since it is divisible by the number (39) formed by its first and last digit.

3985941999 is a deficient number, since it is larger than the sum of its proper divisors (2148826641).

3985941999 is a wasteful number, since it uses less digits than its factorization.

3985941999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 592.

The product of its digits is 28343520, while the sum is 66.

The square root of 3985941999 is about 63134.3171262666. The cubic root of 3985941999 is about 1585.5392286709.

The spelling of 3985941999 in words is "three billion, nine hundred eighty-five million, nine hundred forty-one thousand, nine hundred ninety-nine".