111855540 has 24 divisors (see below), whose sum is σ = 313195680. Its totient is φ = 29828128.

The previous prime is 111855539. The next prime is 111855559. The reversal of 111855540 is 45558111.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 111855498 and 111855507.

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, 932070 + ... + 932189.

It is an arithmetic number, because the mean of its divisors is an integer number (13049820).

Almost surely, 2^111855540 is an apocalyptic number.

111855540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111855540 is an abundant number, since it is smaller than the sum of its proper divisors (201340140).

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

111855540 is a wasteful number, since it uses less digits than its factorization.

111855540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1864271 (or 1864269 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 30.

The square root of 111855540 is about 10576.1779485786. The cubic root of 111855540 is about 481.8211201262.

The spelling of 111855540 in words is "one hundred eleven million, eight hundred fifty-five thousand, five hundred forty".