206972890 has 32 divisors (see below), whose sum is σ = 397152000. Its totient is φ = 77433408.

The previous prime is 206972869. The next prime is 206972891. The reversal of 206972890 is 98279602.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (206972891) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8116 + ... + 21904.

It is an arithmetic number, because the mean of its divisors is an integer number (12411000).

Almost surely, 2^206972890 is an apocalyptic number.

206972890 is a deficient number, since it is larger than the sum of its proper divisors (190179110).

206972890 is a wasteful number, since it uses less digits than its factorization.

206972890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13894.

The product of its (nonzero) digits is 108864, while the sum is 43.

The square root of 206972890 is about 14386.5524014616. The cubic root of 206972890 is about 591.5223445739.

The spelling of 206972890 in words is "two hundred six million, nine hundred seventy-two thousand, eight hundred ninety".