3861658 has 16 divisors (see below), whose sum is σ = 6009696. Its totient is φ = 1859760.

The previous prime is 3861607. The next prime is 3861659. The reversal of 3861658 is 8561683.

It is not an unprimeable number, because it can be changed into a prime (3861659) 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 7 ways as a sum of consecutive naturals, for example, 6868 + ... + 7408.

It is an arithmetic number, because the mean of its divisors is an integer number (375606).

Almost surely, 2^3861658 is an apocalyptic number.

3861658 is a deficient number, since it is larger than the sum of its proper divisors (2148038).

3861658 is a wasteful number, since it uses less digits than its factorization.

3861658 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 669.

The product of its digits is 34560, while the sum is 37.

The square root of 3861658 is about 1965.1101750284. The cubic root of 3861658 is about 156.8885573697. Note that the first 3 decimals are identical.

The spelling of 3861658 in words is "three million, eight hundred sixty-one thousand, six hundred fifty-eight".