3999319272 has 192 divisors, whose sum is σ = 12734904000. Its totient is φ = 1165653504.

The previous prime is 3999319267. The next prime is 3999319273. The reversal of 3999319272 is 2729139993.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (3999319273) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 476004 + ... + 484332.

It is an arithmetic number, because the mean of its divisors is an integer number (66327625).

Almost surely, 2^3999319272 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 3999319272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6367452000).

3999319272 is an abundant number, since it is smaller than the sum of its proper divisors (8735584728).

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

3999319272 is a wasteful number, since it uses less digits than its factorization.

3999319272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8382 (or 8366 counting only the distinct ones).

The product of its digits is 1653372, while the sum is 54.

The square root of 3999319272 is about 63240.1713470164. The cubic root of 3999319272 is about 1587.3109978309.

The spelling of 3999319272 in words is "three billion, nine hundred ninety-nine million, three hundred nineteen thousand, two hundred seventy-two".