4009881 has 8 divisors (see below), whose sum is σ = 5519104. Its totient is φ = 2586960.

The previous prime is 4009861. The next prime is 4009891. The reversal of 4009881 is 1889004.

It is a happy number.

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

It is not a de Polignac number, because 4009881 - 2⁵ = 4009849 is a prime.

It is a super-2 number, since 2×4009881² = 32158291268322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4009861) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21466 + ... + 21651.

It is an arithmetic number, because the mean of its divisors is an integer number (689888).

Almost surely, 2^4009881 is an apocalyptic number.

It is an amenable number.

4009881 is a deficient number, since it is larger than the sum of its proper divisors (1509223).

4009881 is a wasteful number, since it uses less digits than its factorization.

4009881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43151.

The product of its (nonzero) digits is 2304, while the sum is 30.

The square root of 4009881 is about 2002.4687263476. The cubic root of 4009881 is about 158.8707069644.

The spelling of 4009881 in words is "four million, nine thousand, eight hundred eighty-one".