3999928716 has 144 divisors (see below), whose sum is σ = 12614434560. Its totient is φ = 1082652480.

The previous prime is 3999928679. The next prime is 3999928739. The reversal of 3999928716 is 6178299993.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 113806 + ... + 144746.

It is an arithmetic number, because the mean of its divisors is an integer number (87600240).

Almost surely, 2^3999928716 is an apocalyptic number.

3999928716 is a gapful number since it is divisible by the number (36) 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 3999928716, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6307217280).

3999928716 is an abundant number, since it is smaller than the sum of its proper divisors (8614505844).

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

3999928716 is a wasteful number, since it uses less digits than its factorization.

3999928716 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30986 (or 30972 counting only the distinct ones).

The product of its digits is 13226976, while the sum is 63.

The square root of 3999928716 is about 63244.9896513550. The cubic root of 3999928716 is about 1587.3916222208.

The spelling of 3999928716 in words is "three billion, nine hundred ninety-nine million, nine hundred twenty-eight thousand, seven hundred sixteen".