206638072 has 32 divisors (see below), whose sum is σ = 425577600. Its totient is φ = 93623904.

The previous prime is 206638051. The next prime is 206638087. The reversal of 206638072 is 270836602.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 26058 + ... + 33049.

It is an arithmetic number, because the mean of its divisors is an integer number (13299300).

Almost surely, 2^206638072 is an apocalyptic number.

It is an amenable number.

206638072 is an abundant number, since it is smaller than the sum of its proper divisors (218939528).

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

206638072 is a wasteful number, since it uses less digits than its factorization.

206638072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59155 (or 59151 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 34.

The square root of 206638072 is about 14374.9111997257. The cubic root of 206638072 is about 591.2032058045.

The spelling of 206638072 in words is "two hundred six million, six hundred thirty-eight thousand, seventy-two".