2128648 has 8 divisors (see below), whose sum is σ = 3991230. Its totient is φ = 1064320.

The previous prime is 2128631. The next prime is 2128649. The reversal of 2128648 is 8468212.

It can be written as a sum of positive squares in only one way, i.e., 2079364 + 49284 = 1442^2 + 222^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×2128648² = 9062284615808, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2128649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 133033 + ... + 133048.

2^2128648 is an apocalyptic number.

It is an amenable number.

2128648 is a deficient number, since it is larger than the sum of its proper divisors (1862582).

2128648 is a wasteful number, since it uses less digits than its factorization.

2128648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 266087 (or 266083 counting only the distinct ones).

The product of its digits is 6144, while the sum is 31.

The square root of 2128648 is about 1458.9886908403. The cubic root of 2128648 is about 128.6376063782.

The spelling of 2128648 in words is "two million, one hundred twenty-eight thousand, six hundred forty-eight".