3877985 has 8 divisors (see below), whose sum is σ = 4767336. Its totient is φ = 3026560.

The previous prime is 3877943. The next prime is 3877987. The reversal of 3877985 is 5897783.

3877985 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 160801 + 3717184 = 401^2 + 1928^2 .

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

It is a de Polignac number, because none of the positive numbers 2^k-3877985 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3877987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9254 + ... + 9663.

It is an arithmetic number, because the mean of its divisors is an integer number (595917).

Almost surely, 2^3877985 is an apocalyptic number.

It is an amenable number.

3877985 is a deficient number, since it is larger than the sum of its proper divisors (889351).

3877985 is a wasteful number, since it uses less digits than its factorization.

3877985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18963.

The product of its digits is 423360, while the sum is 47.

The square root of 3877985 is about 1969.2600133045. The cubic root of 3877985 is about 157.1093535422.

The spelling of 3877985 in words is "three million, eight hundred seventy-seven thousand, nine hundred eighty-five".