10881891 has 16 divisors (see below), whose sum is σ = 16345120. Its totient is φ = 7153920.

The previous prime is 10881877. The next prime is 10881929. The reversal of 10881891 is 19818801.

It is not a de Polignac number, because 10881891 - 2⁹ = 10881379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10881821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 790 + ... + 4731.

It is an arithmetic number, because the mean of its divisors is an integer number (1021570).

Almost surely, 2^10881891 is an apocalyptic number.

10881891 is a deficient number, since it is larger than the sum of its proper divisors (5463229).

10881891 is an equidigital number, since it uses as much as digits as its factorization.

10881891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5603 (or 5597 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 36.

The square root of 10881891 is about 3298.7711348319. The cubic root of 10881891 is about 221.5991671414.

The spelling of 10881891 in words is "ten million, eight hundred eighty-one thousand, eight hundred ninety-one".