111789648 has 30 divisors (see below), whose sum is σ = 312856154. Its totient is φ = 37263168.

The previous prime is 111789647. The next prime is 111789649. The reversal of 111789648 is 846987111.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (111789647) and next prime (111789649).

It can be written as a sum of positive squares in only one way, i.e., 86266944 + 25522704 = 9288^2 + 5052^2 .

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111789647) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 388015 + ... + 388302.

Almost surely, 2^111789648 is an apocalyptic number.

111789648 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

111789648 is an abundant number, since it is smaller than the sum of its proper divisors (201066506).

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

111789648 is a wasteful number, since it uses less digits than its factorization.

111789648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 776331 (or 776322 counting only the distinct ones).

The product of its digits is 96768, while the sum is 45.

The square root of 111789648 is about 10573.0623756791. The cubic root of 111789648 is about 481.7264909483.

The spelling of 111789648 in words is "one hundred eleven million, seven hundred eighty-nine thousand, six hundred forty-eight".