2128215384 has 192 divisors, whose sum is σ = 6349324800. Its totient is φ = 665967744.

The previous prime is 2128215343. The next prime is 2128215391. The reversal of 2128215384 is 4835128212.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5798769 + ... + 5799135.

It is an arithmetic number, because the mean of its divisors is an integer number (33069400).

Almost surely, 2^2128215384 is an apocalyptic number.

2128215384 is a gapful number since it is divisible by the number (24) 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 2128215384, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3174662400).

2128215384 is an abundant number, since it is smaller than the sum of its proper divisors (4221109416).

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

2128215384 is a wasteful number, since it uses less digits than its factorization.

2128215384 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 564 (or 548 counting only the distinct ones).

The product of its digits is 30720, while the sum is 36.

The square root of 2128215384 is about 46132.5848397854. The cubic root of 2128215384 is about 1286.2889122857.

The spelling of 2128215384 in words is "two billion, one hundred twenty-eight million, two hundred fifteen thousand, three hundred eighty-four".