11139439444 has 12 divisors (see below), whose sum is σ = 22278878944. Its totient is φ = 4774045464.

The previous prime is 11139439439. The next prime is 11139439463. The reversal of 11139439444 is 44493493111.

11139439444 is an admirable number.

It is a super-2 number, since 2×11139439444² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 11139439444.

It is a congruent number.

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, 198918534 + ... + 198918589.

Almost surely, 2^11139439444 is an apocalyptic number.

11139439444 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

11139439444 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11139439444 is a wasteful number, since it uses less digits than its factorization.

11139439444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 397837134 (or 397837132 counting only the distinct ones).

The product of its digits is 186624, while the sum is 43.

The spelling of 11139439444 in words is "eleven billion, one hundred thirty-nine million, four hundred thirty-nine thousand, four hundred forty-four".