111305680 has 40 divisors (see below), whose sum is σ = 261224352. Its totient is φ = 44102784.

The previous prime is 111305659. The next prime is 111305713. The reversal of 111305680 is 86503111.

It is a tau number, because it is divible by the number of its divisors (40).

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, 2059 + ... + 15061.

Almost surely, 2^111305680 is an apocalyptic number.

111305680 is a gapful number since it is divisible by the number (10) 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 111305680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (130612176).

111305680 is an abundant number, since it is smaller than the sum of its proper divisors (149918672).

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

111305680 is a wasteful number, since it uses less digits than its factorization.

111305680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13123 (or 13117 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 25.

The square root of 111305680 is about 10550.1507098240. The cubic root of 111305680 is about 481.0303100267.

Adding to 111305680 its reverse (86503111), we get a palindrome (197808791).

The spelling of 111305680 in words is "one hundred eleven million, three hundred five thousand, six hundred eighty".