105817988 has 12 divisors (see below), whose sum is σ = 185786832. Its totient is φ = 52736040.

The previous prime is 105817949. The next prime is 105817993. The reversal of 105817988 is 889718501.

It is a super-2 number, since 2×105817988² = 22394893168736288, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41858 + ... + 44313.

It is an arithmetic number, because the mean of its divisors is an integer number (15482236).

Almost surely, 2^105817988 is an apocalyptic number.

It is an amenable number.

105817988 is a deficient number, since it is larger than the sum of its proper divisors (79968844).

105817988 is a wasteful number, since it uses less digits than its factorization.

105817988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86482 (or 86480 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 47.

The square root of 105817988 is about 10286.7870591356. The cubic root of 105817988 is about 472.9913152266.

The spelling of 105817988 in words is "one hundred five million, eight hundred seventeen thousand, nine hundred eighty-eight".