2644738 has 4 divisors (see below), whose sum is σ = 3967110. Its totient is φ = 1322368.

The previous prime is 2644729. The next prime is 2644751. The reversal of 2644738 is 8374462.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 2634129 + 10609 = 1623^2 + 103^2 .

It is a d-powerful number, because it can be written as 2⁹ + 6⁴ + 4² + 4¹⁰ + 7 + 3¹³ + 8 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 661183 + ... + 661186.

2^2644738 is an apocalyptic number.

2644738 is a deficient number, since it is larger than the sum of its proper divisors (1322372).

2644738 is a wasteful number, since it uses less digits than its factorization.

2644738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1322371.

The product of its digits is 32256, while the sum is 34.

The square root of 2644738 is about 1626.2650460488. The cubic root of 2644738 is about 138.2910959580.

The spelling of 2644738 in words is "two million, six hundred forty-four thousand, seven hundred thirty-eight".