3997872 has 30 divisors (see below), whose sum is σ = 11188892. Its totient is φ = 1332576.

The previous prime is 3997871. The next prime is 3997891. The reversal of 3997872 is 2787993.

It is not an unprimeable number, because it can be changed into a prime (3997871) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13738 + ... + 14025.

Almost surely, 2^3997872 is an apocalyptic number.

It is an amenable number.

3997872 is an abundant number, since it is smaller than the sum of its proper divisors (7191020).

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

3997872 is a wasteful number, since it uses less digits than its factorization.

3997872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27777 (or 27768 counting only the distinct ones).

The product of its digits is 190512, while the sum is 45.

The square root of 3997872 is about 1999.4679292252. The cubic root of 3997872 is about 158.7119502914.

The spelling of 3997872 in words is "three million, nine hundred ninety-seven thousand, eight hundred seventy-two".