2173648 has 20 divisors (see below), whose sum is σ = 4271428. Its totient is φ = 1071360.

The previous prime is 2173643. The next prime is 2173649. The reversal of 2173648 is 8463712.

It can be written as a sum of positive squares in 2 ways, for example, as 399424 + 1774224 = 632^2 + 1332^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2173643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 238 + ... + 2098.

2^2173648 is an apocalyptic number.

It is an amenable number.

2173648 is a deficient number, since it is larger than the sum of its proper divisors (2097780).

2173648 is a wasteful number, since it uses less digits than its factorization.

2173648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1942 (or 1936 counting only the distinct ones).

The product of its digits is 8064, while the sum is 31.

The square root of 2173648 is about 1474.3296781928. The cubic root of 2173648 is about 129.5377666964.

Subtracting 2173648 from its reverse (8463712), we obtain a square (6290064 = 2508²).

The spelling of 2173648 in words is "two million, one hundred seventy-three thousand, six hundred forty-eight".