4008081 has 16 divisors (see below), whose sum is σ = 6663168. Its totient is φ = 2082000.

The previous prime is 4008077. The next prime is 4008089. The reversal of 4008081 is 1808004.

It is not a de Polignac number, because 4008081 - 2² = 4008077 is a prime.

It is a super-2 number, since 2×4008081² = 32129426605122, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (4008089) 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, 8445 + ... + 8906.

It is an arithmetic number, because the mean of its divisors is an integer number (416448).

Almost surely, 2^4008081 is an apocalyptic number.

It is an amenable number.

4008081 is a deficient number, since it is larger than the sum of its proper divisors (2655087).

4008081 is a wasteful number, since it uses less digits than its factorization.

4008081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17372.

The product of its (nonzero) digits is 256, while the sum is 21.

The square root of 4008081 is about 2002.0192306769. The cubic root of 4008081 is about 158.8469315230.

The spelling of 4008081 in words is "four million, eight thousand, eighty-one".