3870813 has 16 divisors (see below), whose sum is σ = 5529600. Its totient is φ = 2401200.

The previous prime is 3870803. The next prime is 3870821. The reversal of 3870813 is 3180783.

3870813 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 3870813 - 2⁸ = 3870557 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3870803) 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 15 ways as a sum of consecutive naturals, for example, 2788 + ... + 3938.

It is an arithmetic number, because the mean of its divisors is an integer number (345600).

Almost surely, 2^3870813 is an apocalyptic number.

It is an amenable number.

3870813 is a deficient number, since it is larger than the sum of its proper divisors (1658787).

3870813 is a wasteful number, since it uses less digits than its factorization.

3870813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1232.

The product of its (nonzero) digits is 4032, while the sum is 30.

The square root of 3870813 is about 1967.4381820022. The cubic root of 3870813 is about 157.0124403573.

Subtracting from 3870813 its sum of digits (30), we obtain a palindrome (3870783).

The spelling of 3870813 in words is "three million, eight hundred seventy thousand, eight hundred thirteen".