3997606144 has 72 divisors (see below), whose sum is σ = 9244766720. Its totient is φ = 1689735168.

The previous prime is 3997606097. The next prime is 3997606153. The reversal of 3997606144 is 4416067993.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 115537 + ... + 146095.

Almost surely, 2^3997606144 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 3997606144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4622383360).

3997606144 is an abundant number, since it is smaller than the sum of its proper divisors (5247160576).

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

3997606144 is an equidigital number, since it uses as much as digits as its factorization.

3997606144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30655 (or 30641 counting only the distinct ones).

The product of its (nonzero) digits is 979776, while the sum is 49.

The square root of 3997606144 is about 63226.6252776471. The cubic root of 3997606144 is about 1587.0843213148.

The spelling of 3997606144 in words is "three billion, nine hundred ninety-seven million, six hundred six thousand, one hundred forty-four".