2644040426 has 8 divisors (see below), whose sum is σ = 4021920864. Its totient is φ = 1303400140.

The previous prime is 2644040407. The next prime is 2644040449. The reversal of 2644040426 is 6240404462.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×2644040426² = 13981899548644522952, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2644040392 and 2644040401.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9309860 + ... + 9310143.

It is an arithmetic number, because the mean of its divisors is an integer number (502740108).

Almost surely, 2^2644040426 is an apocalyptic number.

2644040426 is a deficient number, since it is larger than the sum of its proper divisors (1377880438).

2644040426 is a wasteful number, since it uses less digits than its factorization.

2644040426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18620076.

The product of its (nonzero) digits is 36864, while the sum is 32.

The square root of 2644040426 is about 51420.2336245179. The cubic root of 2644040426 is about 1382.7893637227.

Adding to 2644040426 its reverse (6240404462), we get a palindrome (8884444888).

It can be divided in two parts, 26440 and 40426, that added together give a palindrome (66866).

The spelling of 2644040426 in words is "two billion, six hundred forty-four million, forty thousand, four hundred twenty-six".