105728618 has 16 divisors (see below), whose sum is σ = 161990280. Its totient is φ = 51744000.

The previous prime is 105728611. The next prime is 105728629. The reversal of 105728618 is 816827501.

It can be written as a sum of positive squares in 4 ways, for example, as 105001009 + 727609 = 10247^2 + 853^2 .

It is a super-2 number, since 2×105728618² = 22357081328379848, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (105728611) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 15038 + ... + 20918.

Almost surely, 2^105728618 is an apocalyptic number.

105728618 is a deficient number, since it is larger than the sum of its proper divisors (56261662).

105728618 is a wasteful number, since it uses less digits than its factorization.

105728618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6073.

The product of its (nonzero) digits is 26880, while the sum is 38.

The square root of 105728618 is about 10282.4422196286. The cubic root of 105728618 is about 472.8581206709.

The spelling of 105728618 in words is "one hundred five million, seven hundred twenty-eight thousand, six hundred eighteen".