2161426288 has 90 divisors (see below), whose sum is σ = 5029481912. Its totient is φ = 881411520.

The previous prime is 2161426259. The next prime is 2161426307. The reversal of 2161426288 is 8826241612.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 2161426288.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 11316273 + ... + 11316463.

Almost surely, 2^2161426288 is an apocalyptic number.

2161426288 is a gapful number since it is divisible by the number (28) 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 2161426288, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2514740956).

2161426288 is an abundant number, since it is smaller than the sum of its proper divisors (2868055624).

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

2161426288 is an equidigital number, since it uses as much as digits as its factorization.

2161426288 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 443 (or 223 counting only the distinct ones).

The product of its digits is 73728, while the sum is 40.

The square root of 2161426288 is about 46491.1420380270. The cubic root of 2161426288 is about 1292.9452740415.

The spelling of 2161426288 in words is "two billion, one hundred sixty-one million, four hundred twenty-six thousand, two hundred eighty-eight".