3988518 has 32 divisors (see below), whose sum is σ = 8553600. Its totient is φ = 1236096.

The previous prime is 3988513. The next prime is 3988519. The reversal of 3988518 is 8158893.

It is a super-3 number, since 3×3988518³ (a number of 21 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 3988518.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3988513) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6430 + ... + 7022.

It is an arithmetic number, because the mean of its divisors is an integer number (267300).

Almost surely, 2^3988518 is an apocalyptic number.

3988518 is a gapful number since it is divisible by the number (38) formed by its first and last digit.

3988518 is an abundant number, since it is smaller than the sum of its proper divisors (4565082).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3988518 is a wasteful number, since it uses less digits than its factorization.

3988518 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 676.

The product of its digits is 69120, while the sum is 42.

The square root of 3988518 is about 1997.1274370956. The cubic root of 3988518 is about 158.5880718093.

It can be divided in two parts, 39885 and 18, that added together give a triangular number (39903 = T₂₈₂).

The spelling of 3988518 in words is "three million, nine hundred eighty-eight thousand, five hundred eighteen".