111640338 has 24 divisors (see below), whose sum is σ = 242084700. Its totient is φ = 37183104.

The previous prime is 111640337. The next prime is 111640363. The reversal of 111640338 is 833046111.

111640338 is a `hidden beast` number, since 1 + 11 + 640 + 3 + 3 + 8 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 109558089 + 2082249 = 10467^2 + 1443^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (111640337) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 36118 + ... + 39086.

Almost surely, 2^111640338 is an apocalyptic number.

111640338 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

111640338 is an abundant number, since it is smaller than the sum of its proper divisors (130444362).

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

111640338 is a wasteful number, since it uses less digits than its factorization.

111640338 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5066 (or 5063 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 111640338 is about 10565.9991482112. Note that the first 3 decimals coincide. The cubic root of 111640338 is about 481.5119253782.

Adding to 111640338 its reverse (833046111), we get a palindrome (944686449).

The spelling of 111640338 in words is "one hundred eleven million, six hundred forty thousand, three hundred thirty-eight".