111789540 has 72 divisors (see below), whose sum is σ = 356952960. Its totient is φ = 28240704.

The previous prime is 111789539. The next prime is 111789541. The reversal of 111789540 is 45987111.

It is an interprime number because it is at equal distance from previous prime (111789539) and next prime (111789541).

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

It is a junction number, because it is equal to n+sod(n) for n = 111789495 and 111789504.

It is not an unprimeable number, because it can be changed into a prime (111789541) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12924 + ... + 19763.

It is an arithmetic number, because the mean of its divisors is an integer number (4957680).

Almost surely, 2^111789540 is an apocalyptic number.

111789540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111789540 is an abundant number, since it is smaller than the sum of its proper divisors (245163420).

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

111789540 is a wasteful number, since it uses less digits than its factorization.

111789540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32721 (or 32716 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 36.

The square root of 111789540 is about 10573.0572683590. The cubic root of 111789540 is about 481.7263358163.

The spelling of 111789540 in words is "one hundred eleven million, seven hundred eighty-nine thousand, five hundred forty".