3997993822 has 8 divisors (see below), whose sum is σ = 6055214256. Its totient is φ = 1979589072.

The previous prime is 3997993817. The next prime is 3997993849. The reversal of 3997993822 is 2283997993.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9703663 + ... + 9704074.

It is an arithmetic number, because the mean of its divisors is an integer number (756901782).

Almost surely, 2^3997993822 is an apocalyptic number.

3997993822 is a deficient number, since it is larger than the sum of its proper divisors (2057220434).

3997993822 is a wasteful number, since it uses less digits than its factorization.

3997993822 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19407842.

The product of its digits is 13226976, while the sum is 61.

The square root of 3997993822 is about 63229.6909845367. The cubic root of 3997993822 is about 1587.1356234996.

The spelling of 3997993822 in words is "three billion, nine hundred ninety-seven million, nine hundred ninety-three thousand, eight hundred twenty-two".