2644939 has 6 divisors (see below), whose sum is σ = 2907380. Its totient is φ = 2404380.

The previous prime is 2644927. The next prime is 2644981. The reversal of 2644939 is 9394462.

It is not a de Polignac number, because 2644939 - 2⁵ = 2644907 is a prime.

It is a d-powerful number, because it can be written as 2 + 6⁴ + 4 + 4¹⁰ + 9 + 3¹³ + 9³ .

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2644898 and 2644907.

It is not an unprimeable number, because it can be changed into a prime (2644919) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10809 + ... + 11050.

2^2644939 is an apocalyptic number.

2644939 is a deficient number, since it is larger than the sum of its proper divisors (262441).

2644939 is a wasteful number, since it uses less digits than its factorization.

2644939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21881 (or 21870 counting only the distinct ones).

The product of its digits is 46656, while the sum is 37.

The square root of 2644939 is about 1626.3268429193. The cubic root of 2644939 is about 138.2945992422.

The spelling of 2644939 in words is "two million, six hundred forty-four thousand, nine hundred thirty-nine".