111280380 has 24 divisors (see below), whose sum is σ = 311585232. Its totient is φ = 29674752.

The previous prime is 111280363. The next prime is 111280391. The reversal of 111280380 is 83082111.

It is a self number, because there is not a number n which added to its sum of digits gives 111280380.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 927277 + ... + 927396.

It is an arithmetic number, because the mean of its divisors is an integer number (12982718).

Almost surely, 2^111280380 is an apocalyptic number.

111280380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111280380 is an abundant number, since it is smaller than the sum of its proper divisors (200304852).

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

111280380 is a wasteful number, since it uses less digits than its factorization.

111280380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1854685 (or 1854683 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 24.

The square root of 111280380 is about 10548.9516066764. The cubic root of 111280380 is about 480.9938608864.

The spelling of 111280380 in words is "one hundred eleven million, two hundred eighty thousand, three hundred eighty".