3872870 has 16 divisors (see below), whose sum is σ = 7004448. Its totient is φ = 1541760.

The previous prime is 3872851. The next prime is 3872873. The reversal of 3872870 is 782783.

It is a happy number.

3872870 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 3872870.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3872873) 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, 1607 + ... + 3213.

It is an arithmetic number, because the mean of its divisors is an integer number (437778).

Almost surely, 2^3872870 is an apocalyptic number.

3872870 is the 1607-th pentagonal number.

3872870 is a deficient number, since it is larger than the sum of its proper divisors (3131578).

3872870 is a wasteful number, since it uses less digits than its factorization.

3872870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1855.

The product of its (nonzero) digits is 18816, while the sum is 35.

The square root of 3872870 is about 1967.9608735948. The cubic root of 3872870 is about 157.0402482447.

The spelling of 3872870 in words is "three million, eight hundred seventy-two thousand, eight hundred seventy".