111506640 has 80 divisors (see below), whose sum is σ = 395058048. Its totient is φ = 25486848.

The previous prime is 111506617. The next prime is 111506651. The reversal of 111506640 is 46605111.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 111506640.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31507 + ... + 34866.

Almost surely, 2^111506640 is an apocalyptic number.

111506640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111506640 is an abundant number, since it is smaller than the sum of its proper divisors (283551408).

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

111506640 is a wasteful number, since it uses less digits than its factorization.

111506640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66396 (or 66390 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 24.

The square root of 111506640 is about 10559.6704494032. The cubic root of 111506640 is about 481.3196325847.

The spelling of 111506640 in words is "one hundred eleven million, five hundred six thousand, six hundred forty".