3861558 has 12 divisors (see below), whose sum is σ = 8366748. Its totient is φ = 1287180.

The previous prime is 3861551. The next prime is 3861563. The reversal of 3861558 is 8551683.

3861558 is a `hidden beast` number, since 38 + 615 + 5 + 8 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3861551) 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 5 ways as a sum of consecutive naturals, for example, 107248 + ... + 107283.

It is an arithmetic number, because the mean of its divisors is an integer number (697229).

Almost surely, 2^3861558 is an apocalyptic number.

3861558 is an abundant number, since it is smaller than the sum of its proper divisors (4505190).

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

3861558 is a wasteful number, since it uses less digits than its factorization.

3861558 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214539 (or 214536 counting only the distinct ones).

The product of its digits is 28800, while the sum is 36.

The square root of 3861558 is about 1965.0847309976. The cubic root of 3861558 is about 156.8872031163.

The spelling of 3861558 in words is "three million, eight hundred sixty-one thousand, five hundred fifty-eight".