4391108891 has 16 divisors (see below), whose sum is σ = 5011776000. Its totient is φ = 3811304448.

The previous prime is 4391108881. The next prime is 4391108893. The reversal of 4391108891 is 1988011934.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4391108891 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4391108893) 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, 240710 + ... + 258308.

It is an arithmetic number, because the mean of its divisors is an integer number (313236000).

Almost surely, 2^4391108891 is an apocalyptic number.

4391108891 is a deficient number, since it is larger than the sum of its proper divisors (620667109).

4391108891 is a wasteful number, since it uses less digits than its factorization.

4391108891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18758.

The product of its (nonzero) digits is 62208, while the sum is 44.

The square root of 4391108891 is about 66265.4426605603. The cubic root of 4391108891 is about 1637.5380583272.

The spelling of 4391108891 in words is "four billion, three hundred ninety-one million, one hundred eight thousand, eight hundred ninety-one".