3999416820 has 96 divisors (see below), whose sum is σ = 12819265536. Its totient is φ = 912643200.

The previous prime is 3999416819. The next prime is 3999416833. The reversal of 3999416820 is 286149993.

3999416820 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 257475 + ... + 272565.

It is an arithmetic number, because the mean of its divisors is an integer number (133534016).

Almost surely, 2^3999416820 is an apocalyptic number.

3999416820 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 3999416820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6409632768).

3999416820 is an abundant number, since it is smaller than the sum of its proper divisors (8819848716).

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

3999416820 is a wasteful number, since it uses less digits than its factorization.

3999416820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15741 (or 15739 counting only the distinct ones).

The product of its (nonzero) digits is 839808, while the sum is 51.

The square root of 3999416820 is about 63240.9425925958. The cubic root of 3999416820 is about 1587.3239031733.

The spelling of 3999416820 in words is "three billion, nine hundred ninety-nine million, four hundred sixteen thousand, eight hundred twenty".