11438944209 has 81 divisors (see below), whose sum is σ = 21172436649. Its totient is φ = 5929474320.

The previous prime is 11438944183. The next prime is 11438944211. The reversal of 11438944209 is 90244983411.

11438944209 = 1³ + 2³ + ... + 462³.

The square root of 11438944209 is 106953.

It is a perfect power (a square), and thus also a powerful number.

11438944209 is a `hidden beast` number, since 1 + 1 + 438 + 9 + 4 + 4 + 209 = 666.

It is not a de Polignac number, because 11438944209 - 2¹¹ = 11438942161 is a prime.

It is a super-2 number, since 2×11438944209² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11438940209) by changing a digit.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 24705912 + ... + 24706374.

Almost surely, 2^11438944209 is an apocalyptic number.

11438944209 is the 106953-rd square number.

11438944209 is the 53477-th centered octagonal number.

It is an amenable number.

11438944209 is a deficient number, since it is larger than the sum of its proper divisors (9733492440).

11438944209 is an equidigital number, since it uses as much as digits as its factorization.

11438944209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 968 (or 484 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 45.

The spelling of 11438944209 in words is "eleven billion, four hundred thirty-eight million, nine hundred forty-four thousand, two hundred nine".