2109128590 has 32 divisors (see below), whose sum is σ = 3821204160. Its totient is φ = 838166784.

The previous prime is 2109128509. The next prime is 2109128591. The reversal of 2109128590 is 958219012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2109128591) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1122732 + ... + 1124608.

It is an arithmetic number, because the mean of its divisors is an integer number (119412630).

Almost surely, 2^2109128590 is an apocalyptic number.

2109128590 is a deficient number, since it is larger than the sum of its proper divisors (1712075570).

2109128590 is a wasteful number, since it uses less digits than its factorization.

2109128590 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2556.

The product of its (nonzero) digits is 12960, while the sum is 37.

The square root of 2109128590 is about 45925.2500265377. The cubic root of 2109128590 is about 1282.4320196720.

The spelling of 2109128590 in words is "two billion, one hundred nine million, one hundred twenty-eight thousand, five hundred ninety".