4006891 has 16 divisors (see below), whose sum is σ = 4930560. Its totient is φ = 3179520.

The previous prime is 4006879. The next prime is 4006913. The reversal of 4006891 is 1986004.

It is a cyclic number.

It is not a de Polignac number, because 4006891 - 2⁵ = 4006859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4006811) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5931 + ... + 6571.

It is an arithmetic number, because the mean of its divisors is an integer number (308160).

Almost surely, 2^4006891 is an apocalyptic number.

4006891 is a deficient number, since it is larger than the sum of its proper divisors (923669).

4006891 is a wasteful number, since it uses less digits than its factorization.

4006891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 714.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 4006891 is about 2001.7220086715. The cubic root of 4006891 is about 158.8312094056.

The spelling of 4006891 in words is "four million, six thousand, eight hundred ninety-one".