111424404 has 144 divisors (see below), whose sum is σ = 330559488. Its totient is φ = 28589184.

The previous prime is 111424393. The next prime is 111424433. The reversal of 111424404 is 404424111.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 667129 + ... + 667295.

It is an arithmetic number, because the mean of its divisors is an integer number (2295552).

Almost surely, 2^111424404 is an apocalyptic number.

111424404 is a gapful number since it is divisible by the number (14) 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 111424404, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (165279744).

111424404 is an abundant number, since it is smaller than the sum of its proper divisors (219135084).

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

111424404 is a wasteful number, since it uses less digits than its factorization.

111424404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 254 (or 239 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 21.

The square root of 111424404 is about 10555.7758596893. The cubic root of 111424404 is about 481.2012792866.

Adding to 111424404 its reverse (404424111), we get a palindrome (515848515).

The spelling of 111424404 in words is "one hundred eleven million, four hundred twenty-four thousand, four hundred four".