111809404 has 12 divisors (see below), whose sum is σ = 223618864. Its totient is φ = 47918304.

The previous prime is 111809393. The next prime is 111809429. The reversal of 111809404 is 404908111.

111809404 is an admirable number.

It is a Harshad number since it is a multiple of its sum of digits (28), and also a Moran number because the ratio is a prime number: 3993193 = 111809404 / (1 + 1 + 1 + 8 + 0 + 9 + 4 + 0 + 4).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1996569 + ... + 1996624.

Almost surely, 2^111809404 is an apocalyptic number.

111809404 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

111809404 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

111809404 is a wasteful number, since it uses less digits than its factorization.

111809404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3993204 (or 3993202 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 28.

The square root of 111809404 is about 10573.9965954222. The cubic root of 111809404 is about 481.7548669448.

The spelling of 111809404 in words is "one hundred eleven million, eight hundred nine thousand, four hundred four".