111861840 has 40 divisors (see below), whose sum is σ = 346772448. Its totient is φ = 29829760.

The previous prime is 111861809. The next prime is 111861851. The reversal of 111861840 is 48168111.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 111861798 and 111861807.

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, 232806 + ... + 233285.

Almost surely, 2^111861840 is an apocalyptic number.

111861840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111861840 is an abundant number, since it is smaller than the sum of its proper divisors (234910608).

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

111861840 is a wasteful number, since it uses less digits than its factorization.

111861840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 466107 (or 466101 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 30.

The square root of 111861840 is about 10576.4757835491. The cubic root of 111861840 is about 481.8301657699.

The spelling of 111861840 in words is "one hundred eleven million, eight hundred sixty-one thousand, eight hundred forty".