3856920 has 32 divisors (see below), whose sum is σ = 11571120. Its totient is φ = 1028480.

The previous prime is 3856907. The next prime is 3856921. The reversal of 3856920 is 296583.

It is a happy number.

3856920 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3856921) 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, 15951 + ... + 16190.

Almost surely, 2^3856920 is an apocalyptic number.

3856920 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3856920 is an abundant number, since it is smaller than the sum of its proper divisors (7714200).

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

3856920 is a wasteful number, since it uses less digits than its factorization.

3856920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32155 (or 32151 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 33.

The square root of 3856920 is about 1963.9042746529. The cubic root of 3856920 is about 156.8243671349.

The spelling of 3856920 in words is "three million, eight hundred fifty-six thousand, nine hundred twenty".