11338539840 has 112 divisors (see below), whose sum is σ = 39999879360. Its totient is φ = 3023608320.

The previous prime is 11338539829. The next prime is 11338539841. The reversal of 11338539840 is 4893583311.

11338539840 is a `hidden beast` number, since 1 + 1 + 3 + 38 + 539 + 84 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11338539841) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 647526 + ... + 664805.

It is an arithmetic number, because the mean of its divisors is an integer number (357141780).

Almost surely, 2^11338539840 is an apocalyptic number.

11338539840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11338539840 is an abundant number, since it is smaller than the sum of its proper divisors (28661339520).

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

11338539840 is a wasteful number, since it uses less digits than its factorization.

11338539840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1312357 (or 1312341 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 45.

The spelling of 11338539840 in words is "eleven billion, three hundred thirty-eight million, five hundred thirty-nine thousand, eight hundred forty".