3988437 has 4 divisors (see below), whose sum is σ = 5317920. Its totient is φ = 2658956.

The previous prime is 3988433. The next prime is 3988441. The reversal of 3988437 is 7348893.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (3988433) and next prime (3988441).

It is a cyclic number.

It is not a de Polignac number, because 3988437 - 2² = 3988433 is a prime.

It is a D-number.

3988437 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3988433) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 664737 + ... + 664742.

It is an arithmetic number, because the mean of its divisors is an integer number (1329480).

Almost surely, 2^3988437 is an apocalyptic number.

It is an amenable number.

3988437 is a deficient number, since it is larger than the sum of its proper divisors (1329483).

3988437 is a wasteful number, since it uses less digits than its factorization.

3988437 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1329482.

The product of its digits is 145152, while the sum is 42.

The square root of 3988437 is about 1997.1071578661. The cubic root of 3988437 is about 158.5869982509.

The spelling of 3988437 in words is "three million, nine hundred eighty-eight thousand, four hundred thirty-seven".