2175648 has 48 divisors (see below), whose sum is σ = 5787936. Its totient is φ = 715520.

The previous prime is 2175629. The next prime is 2175659. The reversal of 2175648 is 8465712.

It is a tau number, because it is divible by the number of its divisors (48).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12490 + ... + 12662.

It is an arithmetic number, because the mean of its divisors is an integer number (120582).

2^2175648 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 2175648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2893968).

2175648 is an abundant number, since it is smaller than the sum of its proper divisors (3612288).

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

2175648 is a wasteful number, since it uses less digits than its factorization.

2175648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 317 (or 309 counting only the distinct ones).

The product of its digits is 13440, while the sum is 33.

The square root of 2175648 is about 1475.0077965896. The cubic root of 2175648 is about 129.5774842763.

Subtracting 2175648 from its reverse (8465712), we obtain a square (6290064 = 2508²).

The spelling of 2175648 in words is "two million, one hundred seventy-five thousand, six hundred forty-eight".