2171328 has 56 divisors (see below), whose sum is σ = 5900928. Its totient is φ = 704256.

The previous prime is 2171311. The next prime is 2171329. The reversal of 2171328 is 8231712.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a junction number, because it is equal to n+sod(n) for n = 2171298 and 2171307.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2171329) 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, 8125 + ... + 8387.

2^2171328 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2171328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2950464).

2171328 is an abundant number, since it is smaller than the sum of its proper divisors (3729600).

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

2171328 is a wasteful number, since it uses less digits than its factorization.

2171328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 321 (or 311 counting only the distinct ones).

The product of its digits is 672, while the sum is 24.

The square root of 2171328 is about 1473.5426698946. The cubic root of 2171328 is about 129.4916637697.

The spelling of 2171328 in words is "two million, one hundred seventy-one thousand, three hundred twenty-eight".