672105186 has 12 divisors (see below), whose sum is σ = 1456227942. Its totient is φ = 224035056.

The previous prime is 672105157. The next prime is 672105191. The reversal of 672105186 is 681501276.

It can be written as a sum of positive squares in only one way, i.e., 377330625 + 294774561 = 19425^2 + 17169^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 672105186.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 18669571 + ... + 18669606.

Almost surely, 2^672105186 is an apocalyptic number.

672105186 is an abundant number, since it is smaller than the sum of its proper divisors (784122756).

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

672105186 is a wasteful number, since it uses less digits than its factorization.

672105186 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37339185 (or 37339182 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

The square root of 672105186 is about 25924.9915332677. The cubic root of 672105186 is about 875.9495263969.

The spelling of 672105186 in words is "six hundred seventy-two million, one hundred five thousand, one hundred eighty-six".