3986851 has 8 divisors (see below), whose sum is σ = 4367664. Its totient is φ = 3609120.

The previous prime is 3986839. The next prime is 3986897. The reversal of 3986851 is 1586893.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3986851 - 2¹³ = 3978659 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3986051) 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, 2605 + ... + 3841.

It is an arithmetic number, because the mean of its divisors is an integer number (545958).

Almost surely, 2^3986851 is an apocalyptic number.

3986851 is a deficient number, since it is larger than the sum of its proper divisors (380813).

3986851 is a wasteful number, since it uses less digits than its factorization.

3986851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1541.

The product of its digits is 51840, while the sum is 40.

The square root of 3986851 is about 1996.7100440475. The cubic root of 3986851 is about 158.5659747835.

The spelling of 3986851 in words is "three million, nine hundred eighty-six thousand, eight hundred fifty-one".