1306690188 has 12 divisors (see below), whose sum is σ = 3048943800. Its totient is φ = 435563392.

The previous prime is 1306690181. The next prime is 1306690199. The reversal of 1306690188 is 8810966031.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-3 number, since 3×1306690188³ (a number of 28 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (1306690181) 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 3 ways as a sum of consecutive naturals, for example, 54445413 + ... + 54445436.

It is an arithmetic number, because the mean of its divisors is an integer number (254078650).

Almost surely, 2^1306690188 is an apocalyptic number.

It is an amenable number.

1306690188 is an abundant number, since it is smaller than the sum of its proper divisors (1742253612).

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

1306690188 is a wasteful number, since it uses less digits than its factorization.

1306690188 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108890856 (or 108890854 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 42.

The square root of 1306690188 is about 36148.1699121823. The cubic root of 1306690188 is about 1093.2618917312.

The spelling of 1306690188 in words is "one billion, three hundred six million, six hundred ninety thousand, one hundred eighty-eight".