2109128 has 16 divisors (see below), whose sum is σ = 4519680. Its totient is φ = 903888.

The previous prime is 2109127. The next prime is 2109161. The reversal of 2109128 is 8219012.

It is not an unprimeable number, because it can be changed into a prime (2109127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18776 + ... + 18887.

It is an arithmetic number, because the mean of its divisors is an integer number (282480).

2^2109128 is an apocalyptic number.

2109128 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

2109128 is an abundant number, since it is smaller than the sum of its proper divisors (2410552).

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

2109128 is a wasteful number, since it uses less digits than its factorization.

2109128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37676 (or 37672 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 23.

The square root of 2109128 is about 1452.2837188373. The cubic root of 2109128 is about 128.2431900091.

The spelling of 2109128 in words is "two million, one hundred nine thousand, one hundred twenty-eight".