2128140 has 96 divisors (see below), whose sum is σ = 7580160. Its totient is φ = 485568.

The previous prime is 2128103. The next prime is 2128153. The reversal of 2128140 is 418212.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3499 + ... + 4061.

It is an arithmetic number, because the mean of its divisors is an integer number (78960).

2^2128140 is an apocalyptic number.

2128140 is a gapful number since it is divisible by the number (20) 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 2128140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3790080).

2128140 is an abundant number, since it is smaller than the sum of its proper divisors (5452020).

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

2128140 is a wasteful number, since it uses less digits than its factorization.

2128140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 588 (or 580 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

The square root of 2128140 is about 1458.8145872591. The cubic root of 2128140 is about 128.6273724796.

It can be divided in two parts, 21281 and 40, that added together give a triangular number (21321 = T₂₀₆).

The spelling of 2128140 in words is "two million, one hundred twenty-eight thousand, one hundred forty".