111491856 has 240 divisors, whose sum is σ = 390153600. Its totient is φ = 30336768.

The previous prime is 111491843. The next prime is 111491893. The reversal of 111491856 is 658194111.

It is a happy number.

111491856 is a `hidden beast` number, since 111 + 491 + 8 + 56 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 111491856.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 486750 + ... + 486978.

It is an arithmetic number, because the mean of its divisors is an integer number (1625640).

Almost surely, 2^111491856 is an apocalyptic number.

111491856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 111491856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (195076800).

111491856 is an abundant number, since it is smaller than the sum of its proper divisors (278661744).

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

111491856 is a wasteful number, since it uses less digits than its factorization.

111491856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 283 (or 264 counting only the distinct ones).

The product of its digits is 8640, while the sum is 36.

The square root of 111491856 is about 10558.9704043529. The cubic root of 111491856 is about 481.2983598785.

The spelling of 111491856 in words is "one hundred eleven million, four hundred ninety-one thousand, eight hundred fifty-six".