206139072 has 56 divisors (see below), whose sum is σ = 546664896. Its totient is φ = 68555008.

The previous prime is 206139067. The next prime is 206139107. The reversal of 206139072 is 270931602.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 107143 + ... + 109049.

Almost surely, 2^206139072 is an apocalyptic number.

It is an amenable number.

206139072 is an abundant number, since it is smaller than the sum of its proper divisors (340525824).

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

206139072 is a wasteful number, since it uses less digits than its factorization.

206139072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2485 (or 2475 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 30.

The square root of 206139072 is about 14357.5440796816. The cubic root of 206139072 is about 590.7269331529.

The spelling of 206139072 in words is "two hundred six million, one hundred thirty-nine thousand, seventy-two".