2645444 has 6 divisors (see below), whose sum is σ = 4629534. Its totient is φ = 1322720.

The previous prime is 2645431. The next prime is 2645453. The reversal of 2645444 is 4445462.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 2067844 + 577600 = 1438^2 + 760^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 330677 + ... + 330684.

It is an arithmetic number, because the mean of its divisors is an integer number (771589).

2^2645444 is an apocalyptic number.

It is an amenable number.

2645444 is a deficient number, since it is larger than the sum of its proper divisors (1984090).

2645444 is a wasteful number, since it uses less digits than its factorization.

2645444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 661365 (or 661363 counting only the distinct ones).

The product of its digits is 15360, while the sum is 29.

The square root of 2645444 is about 1626.4820933536. The cubic root of 2645444 is about 138.3034002427.

The spelling of 2645444 in words is "two million, six hundred forty-five thousand, four hundred forty-four".