11928839949 has 20 divisors (see below), whose sum is σ = 19190367196. Its totient is φ = 7340823936.

The previous prime is 11928839941. The next prime is 11928839953. The reversal of 11928839949 is 94993882911.

It can be written as a sum of positive squares in 2 ways, for example, as 1398386025 + 10530453924 = 37395^2 + 102618^2 .

It is not a de Polignac number, because 11928839949 - 2³ = 11928839941 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11928839941) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 5663164 + ... + 5665269.

Almost surely, 2^11928839949 is an apocalyptic number.

It is an amenable number.

11928839949 is a deficient number, since it is larger than the sum of its proper divisors (7261527247).

11928839949 is a wasteful number, since it uses less digits than its factorization.

11928839949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11328458 (or 11328449 counting only the distinct ones).

The product of its digits is 10077696, while the sum is 63.

The spelling of 11928839949 in words is "eleven billion, nine hundred twenty-eight million, eight hundred thirty-nine thousand, nine hundred forty-nine".