206189992 has 8 divisors (see below), whose sum is σ = 386606250. Its totient is φ = 103094992.

The previous prime is 206189989. The next prime is 206189999. The reversal of 206189992 is 299981602.

It can be written as a sum of positive squares in only one way, i.e., 185885956 + 20304036 = 13634^2 + 4506^2 .

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

It is a hoax number, since the sum of its digits (46) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (206189999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12886867 + ... + 12886882.

Almost surely, 2^206189992 is an apocalyptic number.

It is an amenable number.

206189992 is a deficient number, since it is larger than the sum of its proper divisors (180416258).

206189992 is a wasteful number, since it uses less digits than its factorization.

206189992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25773755 (or 25773751 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 46.

The square root of 206189992 is about 14359.3172539644. The cubic root of 206189992 is about 590.7755691518.

The spelling of 206189992 in words is "two hundred six million, one hundred eighty-nine thousand, nine hundred ninety-two".