1111423500 has 144 divisors (see below), whose sum is σ = 3825083808. Its totient is φ = 269424000.

The previous prime is 1111423483. The next prime is 1111423507. The reversal of 1111423500 is 53241111.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (1111423507) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 38274 + ... + 60726.

It is an arithmetic number, because the mean of its divisors is an integer number (26563082).

Almost surely, 2^1111423500 is an apocalyptic number.

1111423500 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 1111423500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1912541904).

1111423500 is an abundant number, since it is smaller than the sum of its proper divisors (2713660308).

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

1111423500 is a wasteful number, since it uses less digits than its factorization.

1111423500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22489 (or 22474 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

The square root of 1111423500 is about 33338.0188373574. The cubic root of 1111423500 is about 1035.8412260470.

Adding to 1111423500 its reverse (53241111), we get a palindrome (1164664611).

The spelling of 1111423500 in words is "one billion, one hundred eleven million, four hundred twenty-three thousand, five hundred".