3999115340 has 72 divisors (see below), whose sum is σ = 9632498400. Its totient is φ = 1390977280.

The previous prime is 3999115303. The next prime is 3999115381. The reversal of 3999115340 is 435119993.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a junction number, because it is equal to n+sod(n) for n = 3999115291 and 3999115300.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 19736 + ... + 91584.

It is an arithmetic number, because the mean of its divisors is an integer number (133784700).

Almost surely, 2^3999115340 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 3999115340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4816249200).

3999115340 is an abundant number, since it is smaller than the sum of its proper divisors (5633383060).

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

3999115340 is a wasteful number, since it uses less digits than its factorization.

3999115340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71903 (or 71890 counting only the distinct ones).

The product of its (nonzero) digits is 131220, while the sum is 44.

The square root of 3999115340 is about 63238.5589652389. The cubic root of 3999115340 is about 1587.2840174886.

The spelling of 3999115340 in words is "three billion, nine hundred ninety-nine million, one hundred fifteen thousand, three hundred forty".