3997188 has 90 divisors (see below), whose sum is σ = 11470074. Its totient is φ = 1213056.

The previous prime is 3997181. The next prime is 3997211. The reversal of 3997188 is 8817993.

It can be written as a sum of positive squares in 3 ways, for example, as 5184 + 3992004 = 72^2 + 1998^2 .

It is not an unprimeable number, because it can be changed into a prime (3997181) by changing a digit.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 54720 + ... + 54792.

Almost surely, 2^3997188 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 3997188, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5735037).

3997188 is an abundant number, since it is smaller than the sum of its proper divisors (7472886).

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

3997188 is a wasteful number, since it uses less digits than its factorization.

3997188 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115 (or 91 counting only the distinct ones).

The product of its digits is 108864, while the sum is 45.

The square root of 3997188 is about 1999.2968764043. The cubic root of 3997188 is about 158.7028983787.

The spelling of 3997188 in words is "three million, nine hundred ninety-seven thousand, one hundred eighty-eight".