11438017920 has 384 divisors, whose sum is σ = 46600519680. Its totient is φ = 2529792000.

The previous prime is 11438017897. The next prime is 11438017939. The reversal of 11438017920 is 2971083411.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (384).

It is a super-2 number, since 2×11438017920² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1245345 + ... + 1254495.

It is an arithmetic number, because the mean of its divisors is an integer number (121355520).

Almost surely, 2^11438017920 is an apocalyptic number.

11438017920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11438017920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23300259840).

11438017920 is an abundant number, since it is smaller than the sum of its proper divisors (35162501760).

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

11438017920 is a wasteful number, since it uses less digits than its factorization.

11438017920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9214 (or 9199 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 36.

The spelling of 11438017920 in words is "eleven billion, four hundred thirty-eight million, seventeen thousand, nine hundred twenty".