3861928 has 16 divisors (see below), whose sum is σ = 8275680. Its totient is φ = 1655088.

The previous prime is 3861911. The next prime is 3861929. The reversal of 3861928 is 8291683.

It is not an unprimeable number, because it can be changed into a prime (3861929) 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 3 ways as a sum of consecutive naturals, for example, 34426 + ... + 34537.

It is an arithmetic number, because the mean of its divisors is an integer number (517230).

Almost surely, 2^3861928 is an apocalyptic number.

It is an amenable number.

3861928 is an abundant number, since it is smaller than the sum of its proper divisors (4413752).

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

3861928 is a wasteful number, since it uses less digits than its factorization.

3861928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68976 (or 68972 counting only the distinct ones).

The product of its digits is 20736, while the sum is 37.

The square root of 3861928 is about 1965.1788722658. The cubic root of 3861928 is about 156.8922137373.

The spelling of 3861928 in words is "three million, eight hundred sixty-one thousand, nine hundred twenty-eight".