11940390438 has 64 divisors (see below), whose sum is σ = 25505280000. Its totient is φ = 3715883424.

The previous prime is 11940390431. The next prime is 11940390439. The reversal of 11940390438 is 83409304911.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 11940390438.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11940390431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2424943 + ... + 2429861.

It is an arithmetic number, because the mean of its divisors is an integer number (398520000).

Almost surely, 2^11940390438 is an apocalyptic number.

11940390438 is an abundant number, since it is smaller than the sum of its proper divisors (13564889562).

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

11940390438 is a wasteful number, since it uses less digits than its factorization.

11940390438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5249.

The product of its (nonzero) digits is 93312, while the sum is 42.

The spelling of 11940390438 in words is "eleven billion, nine hundred forty million, three hundred ninety thousand, four hundred thirty-eight".