3984851 has 24 divisors (see below), whose sum is σ = 4875120. Its totient is φ = 3234816.

The previous prime is 3984823. The next prime is 3984859. The reversal of 3984851 is 1584893.

It is a de Polignac number, because none of the positive numbers 2^k-3984851 is a prime.

It is an Ulam number.

It is a Duffinian number.

Its product of digits (34560) is a multiple of the sum of its prime factors (135).

It is not an unprimeable number, because it can be changed into a prime (3984859) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 54551 + ... + 54623.

It is an arithmetic number, because the mean of its divisors is an integer number (203130).

Almost surely, 2^3984851 is an apocalyptic number.

3984851 is a deficient number, since it is larger than the sum of its proper divisors (890269).

3984851 is a wasteful number, since it uses less digits than its factorization.

3984851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135 (or 122 counting only the distinct ones).

The product of its digits is 34560, while the sum is 38.

The square root of 3984851 is about 1996.2091573781. The cubic root of 3984851 is about 158.5394555253.

The spelling of 3984851 in words is "three million, nine hundred eighty-four thousand, eight hundred fifty-one".