111627978 has 64 divisors (see below), whose sum is σ = 284083200. Its totient is φ = 28988400.

The previous prime is 111627959. The next prime is 111627979. The reversal of 111627978 is 879726111.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (111627979) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 20173 + ... + 25103.

It is an arithmetic number, because the mean of its divisors is an integer number (4438800).

Almost surely, 2^111627978 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 111627978, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (142041600).

111627978 is an abundant number, since it is smaller than the sum of its proper divisors (172455222).

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

111627978 is a wasteful number, since it uses less digits than its factorization.

111627978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4968 (or 4954 counting only the distinct ones).

The product of its digits is 42336, while the sum is 42.

The square root of 111627978 is about 10565.4142370283. The cubic root of 111627978 is about 481.4941548986.

The spelling of 111627978 in words is "one hundred eleven million, six hundred twenty-seven thousand, nine hundred seventy-eight".