2166228992 has 48 divisors (see below), whose sum is σ = 4396326480. Its totient is φ = 1066881024.

The previous prime is 2166228887. The next prime is 2166229003. The reversal of 2166228992 is 2998226612.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 129323 + ... + 145109.

It is an arithmetic number, because the mean of its divisors is an integer number (91590135).

Almost surely, 2^2166228992 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2166228992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2198163240).

2166228992 is an abundant number, since it is smaller than the sum of its proper divisors (2230097488).

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

2166228992 is an equidigital number, since it uses as much as digits as its factorization.

2166228992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15876 (or 15856 counting only the distinct ones).

The product of its digits is 373248, while the sum is 47.

The square root of 2166228992 is about 46542.7651950333. The cubic root of 2166228992 is about 1293.9022100333.

The spelling of 2166228992 in words is "two billion, one hundred sixty-six million, two hundred twenty-eight thousand, nine hundred ninety-two".