111888890 has 8 divisors (see below), whose sum is σ = 201400020. Its totient is φ = 44755552.

The previous prime is 111888857. The next prime is 111888899. The reversal of 111888890 is 98888111.

It can be written as a sum of positive squares in 2 ways, for example, as 107474689 + 4414201 = 10367^2 + 2101^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (111888899) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5594435 + ... + 5594454.

Almost surely, 2^111888890 is an apocalyptic number.

111888890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

111888890 is a deficient number, since it is larger than the sum of its proper divisors (89511130).

111888890 is a wasteful number, since it uses less digits than its factorization.

111888890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11188896.

The product of its (nonzero) digits is 36864, while the sum is 44.

The square root of 111888890 is about 10577.7544876027. The cubic root of 111888890 is about 481.8690007457.

The spelling of 111888890 in words is "one hundred eleven million, eight hundred eighty-eight thousand, eight hundred ninety".