3999747822 has 32 divisors (see below), whose sum is σ = 9144326400. Its totient is φ = 1142529408.

The previous prime is 3999747757. The next prime is 3999747823. The reversal of 3999747822 is 2287479993.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3999747823) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 260454 + ... + 275382.

It is an arithmetic number, because the mean of its divisors is an integer number (285760200).

Almost surely, 2^3999747822 is an apocalyptic number.

3999747822 is an abundant number, since it is smaller than the sum of its proper divisors (5144578578).

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

3999747822 is a wasteful number, since it uses less digits than its factorization.

3999747822 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21320.

The product of its digits is 13716864, while the sum is 60.

The square root of 3999747822 is about 63243.5595298051. The cubic root of 3999747822 is about 1587.3676922986.

The spelling of 3999747822 in words is "three billion, nine hundred ninety-nine million, seven hundred forty-seven thousand, eight hundred twenty-two".