3987557 has 8 divisors (see below), whose sum is σ = 4573632. Its totient is φ = 3405600.

The previous prime is 3987551. The next prime is 3987559. The reversal of 3987557 is 7557893.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 3987557 - 2⁸ = 3987301 is a prime.

It is a super-2 number, since 2×3987557² = 31801221656498, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3987551) 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, 1457 + ... + 3177.

It is an arithmetic number, because the mean of its divisors is an integer number (571704).

Almost surely, 2^3987557 is an apocalyptic number.

It is an amenable number.

3987557 is a deficient number, since it is larger than the sum of its proper divisors (586075).

3987557 is a wasteful number, since it uses less digits than its factorization.

3987557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2059.

The product of its digits is 264600, while the sum is 44.

The square root of 3987557 is about 1996.8868270385. The cubic root of 3987557 is about 158.5753339637.

The spelling of 3987557 in words is "three million, nine hundred eighty-seven thousand, five hundred fifty-seven".