3999011016 has 256 divisors, whose sum is σ = 14131353600. Its totient is φ = 908236800.

The previous prime is 3999011011. The next prime is 3999011017. The reversal of 3999011016 is 6101109993.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (3999011011) 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, 452076 + ... + 460836.

It is an arithmetic number, because the mean of its divisors is an integer number (55200600).

Almost surely, 2^3999011016 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3999011016, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7065676800).

3999011016 is an abundant number, since it is smaller than the sum of its proper divisors (10132342584).

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

3999011016 is a wasteful number, since it uses less digits than its factorization.

3999011016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8820 (or 8816 counting only the distinct ones).

The product of its (nonzero) digits is 13122, while the sum is 39.

The square root of 3999011016 is about 63237.7341150045. The cubic root of 3999011016 is about 1587.2702149978.

The spelling of 3999011016 in words is "three billion, nine hundred ninety-nine million, eleven thousand, sixteen".