4006508891 has 32 divisors (see below), whose sum is σ = 5439398400. Its totient is φ = 2855623680.

The previous prime is 4006508839. The next prime is 4006508923. The reversal of 4006508891 is 1988056004.

It is not a de Polignac number, because 4006508891 - 2⁶ = 4006508827 is a prime.

It is a super-2 number, since 2×4006508891² = 32104226987324099762, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4006508791) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4790 + ... + 89643.

It is an arithmetic number, because the mean of its divisors is an integer number (169981200).

Almost surely, 2^4006508891 is an apocalyptic number.

4006508891 is a deficient number, since it is larger than the sum of its proper divisors (1432889509).

4006508891 is a wasteful number, since it uses less digits than its factorization.

4006508891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94499.

The product of its (nonzero) digits is 69120, while the sum is 41.

The square root of 4006508891 is about 63296.9895887632. The cubic root of 4006508891 is about 1588.2616037354.

The spelling of 4006508891 in words is "four billion, six million, five hundred eight thousand, eight hundred ninety-one".