11323431988 has 96 divisors (see below), whose sum is σ = 23145937920. Its totient is φ = 4798080000.

The previous prime is 11323431971. The next prime is 11323431989. The reversal of 11323431988 is 88913432311.

It is a super-2 number, since 2×11323431988² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11323431989) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5282845 + ... + 5284987.

It is an arithmetic number, because the mean of its divisors is an integer number (241103520).

Almost surely, 2^11323431988 is an apocalyptic number.

It is an amenable number.

11323431988 is an abundant number, since it is smaller than the sum of its proper divisors (11822505932).

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

11323431988 is a wasteful number, since it uses less digits than its factorization.

11323431988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2329 (or 2327 counting only the distinct ones).

The product of its digits is 124416, while the sum is 43.

The spelling of 11323431988 in words is "eleven billion, three hundred twenty-three million, four hundred thirty-one thousand, nine hundred eighty-eight".