3985870 has 16 divisors (see below), whose sum is σ = 8199648. Its totient is φ = 1366560.

The previous prime is 3985867. The next prime is 3985879. The reversal of 3985870 is 785893.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3985879) 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 7 ways as a sum of consecutive naturals, for example, 28401 + ... + 28540.

It is an arithmetic number, because the mean of its divisors is an integer number (512478).

Almost surely, 2^3985870 is an apocalyptic number.

3985870 is an abundant number, since it is smaller than the sum of its proper divisors (4213778).

3985870 is a wasteful number, since it uses less digits than its factorization.

3985870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56955.

The product of its (nonzero) digits is 60480, while the sum is 40.

The square root of 3985870 is about 1996.4643748387. The cubic root of 3985870 is about 158.5529681958.

The spelling of 3985870 in words is "three million, nine hundred eighty-five thousand, eight hundred seventy".