2128870 has 16 divisors (see below), whose sum is σ = 3849120. Its totient is φ = 847744.

The previous prime is 2128849. The next prime is 2128871. The reversal of 2128870 is 788212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2128871) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3294 + ... + 3886.

It is an arithmetic number, because the mean of its divisors is an integer number (240570).

2^2128870 is an apocalyptic number.

2128870 is a deficient number, since it is larger than the sum of its proper divisors (1720250).

2128870 is a wasteful number, since it uses less digits than its factorization.

2128870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 959.

The product of its (nonzero) digits is 1792, while the sum is 28.

The square root of 2128870 is about 1459.0647689530. The cubic root of 2128870 is about 128.6420781612.

The spelling of 2128870 in words is "two million, one hundred twenty-eight thousand, eight hundred seventy".