3988555 has 4 divisors (see below), whose sum is σ = 4786272. Its totient is φ = 3190840.

The previous prime is 3988541. The next prime is 3988583. The reversal of 3988555 is 5558893.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5558893 = 23 ⋅241691.

It is not a de Polignac number, because 3988555 - 2⁷ = 3988427 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 398851 + ... + 398860.

It is an arithmetic number, because the mean of its divisors is an integer number (1196568).

Almost surely, 2^3988555 is an apocalyptic number.

3988555 is a deficient number, since it is larger than the sum of its proper divisors (797717).

3988555 is an equidigital number, since it uses as much as digits as its factorization.

3988555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 797716.

The product of its digits is 216000, while the sum is 43.

The square root of 3988555 is about 1997.1367003788. The cubic root of 3988555 is about 158.5885621953.

The spelling of 3988555 in words is "three million, nine hundred eighty-eight thousand, five hundred fifty-five".