111781404 has 48 divisors (see below), whose sum is σ = 331206400. Its totient is φ = 31937328.

The previous prime is 111781387. The next prime is 111781429. The reversal of 111781404 is 404187111.

It is a super-2 number, since 2×111781404² = 24990164560422432, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 73174 + ... + 74685.

Almost surely, 2^111781404 is an apocalyptic number.

111781404 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

111781404 is an abundant number, since it is smaller than the sum of its proper divisors (219424996).

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

111781404 is a wasteful number, since it uses less digits than its factorization.

111781404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147879 (or 147871 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 27.

The square root of 111781404 is about 10572.6725098246. The cubic root of 111781404 is about 481.7146489132.

The spelling of 111781404 in words is "one hundred eleven million, seven hundred eighty-one thousand, four hundred four".