10891660 has 48 divisors (see below), whose sum is σ = 24879456. Its totient is φ = 3981312.

The previous prime is 10891649. The next prime is 10891663. The reversal of 10891660 is 6619801.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (10891663) 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, 42252 + ... + 42508.

It is an arithmetic number, because the mean of its divisors is an integer number (518322).

Almost surely, 2^10891660 is an apocalyptic number.

10891660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 10891660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12439728).

10891660 is an abundant number, since it is smaller than the sum of its proper divisors (13987796).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

10891660 is a wasteful number, since it uses less digits than its factorization.

10891660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 442 (or 440 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 31.

The square root of 10891660 is about 3300.2515055674. The cubic root of 10891660 is about 221.6654593812.

The spelling of 10891660 in words is "ten million, eight hundred ninety-one thousand, six hundred sixty".