206636144 has 40 divisors (see below), whose sum is σ = 470355312. Its totient is φ = 86699520.

The previous prime is 206636123. The next prime is 206636147. The reversal of 206636144 is 441636602.

It is a self number, because there is not a number n which added to its sum of digits gives 206636144.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206636147) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42869 + ... + 47444.

Almost surely, 2^206636144 is an apocalyptic number.

It is an amenable number.

206636144 is an abundant number, since it is smaller than the sum of its proper divisors (263719168).

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

206636144 is a wasteful number, since it uses less digits than its factorization.

206636144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90345 (or 90339 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 32.

The square root of 206636144 is about 14374.8441382855. The cubic root of 206636144 is about 591.2013670931.

The spelling of 206636144 in words is "two hundred six million, six hundred thirty-six thousand, one hundred forty-four".