3987828 has 36 divisors (see below), whose sum is σ = 10857028. Its totient is φ = 1226880.

The previous prime is 3987821. The next prime is 3987829. The reversal of 3987828 is 8287893.

It can be written as a sum of positive squares in 2 ways, for example, as 1205604 + 2782224 = 1098^2 + 1668^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3987821) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 3793 + ... + 4728.

Almost surely, 2^3987828 is an apocalyptic number.

It is an amenable number.

3987828 is an abundant number, since it is smaller than the sum of its proper divisors (6869200).

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

3987828 is a wasteful number, since it uses less digits than its factorization.

3987828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8544 (or 8539 counting only the distinct ones).

The product of its digits is 193536, while the sum is 45.

The square root of 3987828 is about 1996.9546815088. The cubic root of 3987828 is about 158.5789262168.

The spelling of 3987828 in words is "three million, nine hundred eighty-seven thousand, eight hundred twenty-eight".