111903872 has 16 divisors (see below), whose sum is σ = 222933750. Its totient is φ = 55951872.

The previous prime is 111903871. The next prime is 111903887. The reversal of 111903872 is 278309111.

It can be written as a sum of positive squares in only one way, i.e., 64899136 + 47004736 = 8056^2 + 6856^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is a Harshad number since it is a multiple of its sum of digits (32).

It is not an unprimeable number, because it can be changed into a prime (111903871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 436997 + ... + 437252.

Almost surely, 2^111903872 is an apocalyptic number.

It is an amenable number.

111903872 is a deficient number, since it is larger than the sum of its proper divisors (111029878).

111903872 is an frugal number, since it uses more digits than its factorization.

111903872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 874263 (or 874251 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 32.

The square root of 111903872 is about 10578.4626482301. The cubic root of 111903872 is about 481.8905073170.

The spelling of 111903872 in words is "one hundred eleven million, nine hundred three thousand, eight hundred seventy-two".