2128746984 has 144 divisors (see below), whose sum is σ = 6704212320. Its totient is φ = 561375360.

The previous prime is 2128746959. The next prime is 2128747009. The reversal of 2128746984 is 4896478212.

It is an interprime number because it is at equal distance from previous prime (2128746959) and next prime (2128747009).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 193389 + ... + 204099.

It is an arithmetic number, because the mean of its divisors is an integer number (46557030).

Almost surely, 2^2128746984 is an apocalyptic number.

2128746984 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 2128746984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3352106160).

2128746984 is an abundant number, since it is smaller than the sum of its proper divisors (4575465336).

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

2128746984 is a wasteful number, since it uses less digits than its factorization.

2128746984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10760 (or 10736 counting only the distinct ones).

The product of its digits is 1548288, while the sum is 51.

The square root of 2128746984 is about 46138.3461342081. The cubic root of 2128746984 is about 1286.3960026778.

The spelling of 2128746984 in words is "two billion, one hundred twenty-eight million, seven hundred forty-six thousand, nine hundred eighty-four".