111887920 has 20 divisors (see below), whose sum is σ = 260139600. Its totient is φ = 44755136.

The previous prime is 111887873. The next prime is 111887921. The reversal of 111887920 is 29788111.

It is a tau number, because it is divible by the number of its divisors (20).

It is a self number, because there is not a number n which added to its sum of digits gives 111887920.

It is not an unprimeable number, because it can be changed into a prime (111887921) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 699220 + ... + 699379.

It is an arithmetic number, because the mean of its divisors is an integer number (13006980).

Almost surely, 2^111887920 is an apocalyptic number.

111887920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111887920 is an abundant number, since it is smaller than the sum of its proper divisors (148251680).

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

111887920 is a wasteful number, since it uses less digits than its factorization.

111887920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1398612 (or 1398606 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 37.

The square root of 111887920 is about 10577.7086365621. The cubic root of 111887920 is about 481.8676082503.

The spelling of 111887920 in words is "one hundred eleven million, eight hundred eighty-seven thousand, nine hundred twenty".