3988897 has 16 divisors (see below), whose sum is σ = 4681152. Its totient is φ = 3358720.

The previous prime is 3988889. The next prime is 3988903. The reversal of 3988897 is 7988893.

It is a cyclic number.

It is not a de Polignac number, because 3988897 - 2³ = 3988889 is a prime.

It is a super-2 number, since 2×3988897² = 31822598553218, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3988877) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15393 + ... + 15649.

It is an arithmetic number, because the mean of its divisors is an integer number (292572).

Almost surely, 2^3988897 is an apocalyptic number.

It is an amenable number.

3988897 is a deficient number, since it is larger than the sum of its proper divisors (692255).

3988897 is a wasteful number, since it uses less digits than its factorization.

3988897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 368.

The product of its digits is 870912, while the sum is 52.

The square root of 3988897 is about 1997.2223211250. Note that the first 3 decimals coincide. The cubic root of 3988897 is about 158.5930948091.

The spelling of 3988897 in words is "three million, nine hundred eighty-eight thousand, eight hundred ninety-seven".