3988631 has 8 divisors (see below), whose sum is σ = 4180800. Its totient is φ = 3800160.

The previous prime is 3988627. The next prime is 3988643. The reversal of 3988631 is 1368893.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 3988631 - 2² = 3988627 is a prime.

It is a super-2 number, since 2×3988631² = 31818354508322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3988601) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1421 + ... + 3161.

It is an arithmetic number, because the mean of its divisors is an integer number (522600).

Almost surely, 2^3988631 is an apocalyptic number.

3988631 is a deficient number, since it is larger than the sum of its proper divisors (192169).

3988631 is a wasteful number, since it uses less digits than its factorization.

3988631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1849.

The product of its digits is 31104, while the sum is 38.

The square root of 3988631 is about 1997.1557275285. The cubic root of 3988631 is about 158.5895694652.

The spelling of 3988631 in words is "three million, nine hundred eighty-eight thousand, six hundred thirty-one".