3988257 has 24 divisors (see below), whose sum is σ = 6664896. Its totient is φ = 2102688.

The previous prime is 3988249. The next prime is 3988273. The reversal of 3988257 is 7528893.

It is not a de Polignac number, because 3988257 - 2³ = 3988249 is a prime.

It is a nialpdrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (3988247) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 868 + ... + 2954.

It is an arithmetic number, because the mean of its divisors is an integer number (277704).

Almost surely, 2^3988257 is an apocalyptic number.

It is an amenable number.

3988257 is a deficient number, since it is larger than the sum of its proper divisors (2676639).

3988257 is a wasteful number, since it uses less digits than its factorization.

3988257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2117 (or 2110 counting only the distinct ones).

The product of its digits is 120960, while the sum is 42.

The square root of 3988257 is about 1997.0620921744. The cubic root of 3988257 is about 158.5846125136.

The spelling of 3988257 in words is "three million, nine hundred eighty-eight thousand, two hundred fifty-seven".