3864870 has 24 divisors (see below), whose sum is σ = 10048896. Its totient is φ = 1030608.

The previous prime is 3864841. The next prime is 3864871. The reversal of 3864870 is 784683.

3864870 is a `hidden beast` number, since 3 + 8 + 648 + 7 + 0 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3864871) 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, 21382 + ... + 21561.

It is an arithmetic number, because the mean of its divisors is an integer number (418704).

Almost surely, 2^3864870 is an apocalyptic number.

3864870 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

3864870 is an abundant number, since it is smaller than the sum of its proper divisors (6184026).

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

3864870 is a wasteful number, since it uses less digits than its factorization.

3864870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42956 (or 42953 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The square root of 3864870 is about 1965.9272621336. The cubic root of 3864870 is about 156.9320435609.

The spelling of 3864870 in words is "three million, eight hundred sixty-four thousand, eight hundred seventy".