2128890 has 32 divisors (see below), whose sum is σ = 5287680. Its totient is φ = 547904.

The previous prime is 2128873. The next prime is 2128891. The reversal of 2128890 is 988212.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (2128891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 354 + ... + 2093.

It is an arithmetic number, because the mean of its divisors is an integer number (165240).

2^2128890 is an apocalyptic number.

2128890 is an abundant number, since it is smaller than the sum of its proper divisors (3158790).

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

2128890 is a wasteful number, since it uses less digits than its factorization.

2128890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2486.

The product of its (nonzero) digits is 2304, while the sum is 30.

The square root of 2128890 is about 1459.0716226423. The cubic root of 2128890 is about 128.6424810092.

The spelling of 2128890 in words is "two million, one hundred twenty-eight thousand, eight hundred ninety".