2153644 has 6 divisors (see below), whose sum is σ = 3768884. Its totient is φ = 1076820.

The previous prime is 2153639. The next prime is 2153647. The reversal of 2153644 is 4463512.

2153644 = 2⁴ + 3⁴ + ... + 25⁴.

It is not an unprimeable number, because it can be changed into a prime (2153647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 269202 + ... + 269209.

2^2153644 is an apocalyptic number.

It is an amenable number.

2153644 is a deficient number, since it is larger than the sum of its proper divisors (1615240).

2153644 is a wasteful number, since it uses less digits than its factorization.

2153644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 538415 (or 538413 counting only the distinct ones).

The product of its digits is 2880, while the sum is 25.

The square root of 2153644 is about 1467.5298974808. The cubic root of 2153644 is about 129.1391643608.

The spelling of 2153644 in words is "two million, one hundred fifty-three thousand, six hundred forty-four".