106686728 has 8 divisors (see below), whose sum is σ = 200037630. Its totient is φ = 53343360.

The previous prime is 106686707. The next prime is 106686761. The reversal of 106686728 is 827686601.

It can be written as a sum of positive squares in only one way, i.e., 93741124 + 12945604 = 9682^2 + 3598^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×106686728² = 22764115862691968, 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 as a sum of consecutive naturals, namely, 6667913 + ... + 6667928.

Almost surely, 2^106686728 is an apocalyptic number.

It is an amenable number.

106686728 is a deficient number, since it is larger than the sum of its proper divisors (93350902).

106686728 is a wasteful number, since it uses less digits than its factorization.

106686728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13335847 (or 13335843 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 44.

The square root of 106686728 is about 10328.9267593492. The cubic root of 106686728 is about 474.2821704109.

The spelling of 106686728 in words is "one hundred six million, six hundred eighty-six thousand, seven hundred twenty-eight".