111139638 has 16 divisors (see below), whose sum is σ = 228287280. Its totient is φ = 36045216.

The previous prime is 111139627. The next prime is 111139661. The reversal of 111139638 is 836931111.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 111139599 and 111139608.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 250093 + ... + 250536.

It is an arithmetic number, because the mean of its divisors is an integer number (14267955).

Almost surely, 2^111139638 is an apocalyptic number.

111139638 is an abundant number, since it is smaller than the sum of its proper divisors (117147642).

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

111139638 is a wasteful number, since it uses less digits than its factorization.

111139638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 500671.

The product of its digits is 3888, while the sum is 33.

The square root of 111139638 is about 10542.2785962049. The cubic root of 111139638 is about 480.7909961418.

The spelling of 111139638 in words is "one hundred eleven million, one hundred thirty-nine thousand, six hundred thirty-eight".