2644072 has 8 divisors (see below), whose sum is σ = 4957650. Its totient is φ = 1322032.

The previous prime is 2644067. The next prime is 2644073. The reversal of 2644072 is 2704462.

It can be written as a sum of positive squares in only one way, i.e., 2643876 + 196 = 1626^2 + 14^2 .

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

It is a super-2 number, since 2×2644072² = 13982233482368, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2644073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165247 + ... + 165262.

2^2644072 is an apocalyptic number.

It is an amenable number.

2644072 is a deficient number, since it is larger than the sum of its proper divisors (2313578).

2644072 is a wasteful number, since it uses less digits than its factorization.

2644072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 330515 (or 330511 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 25.

The square root of 2644072 is about 1626.0602694857. The cubic root of 2644072 is about 138.2794867927.

The spelling of 2644072 in words is "two million, six hundred forty-four thousand, seventy-two".