3997000000 has 196 divisors, whose sum is σ = 11350479712. Its totient is φ = 1368000000.

The previous prime is 3996999989. The next prime is 3997000001. The reversal of 3997000000 is 7993.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3997000001) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 6999715 + ... + 7000285.

Almost surely, 2^3997000000 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 3997000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5675239856).

3997000000 is an abundant number, since it is smaller than the sum of its proper divisors (7353479712).

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

3997000000 is an frugal number, since it uses more digits than its factorization.

3997000000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 620 (or 585 counting only the distinct ones).

The product of its (nonzero) digits is 1701, while the sum is 28.

The square root of 3997000000 is about 63221.8316722950. The cubic root of 3997000000 is about 1587.0041024513.

Adding to 3997000000 its reverse (7993), we get a palindrome (3997007993).

The spelling of 3997000000 in words is "three billion, nine hundred ninety-seven million", and thus it is an aban number.