206545728 has 28 divisors (see below), whose sum is σ = 546486080. Its totient is φ = 68848512.

The previous prime is 206545723. The next prime is 206545739. The reversal of 206545728 is 827545602.

It is a super-2 number, since 2×206545728² = 85322275510099968, which contains 22 as substring.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206545723) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 537688 + ... + 538071.

It is an arithmetic number, because the mean of its divisors is an integer number (19517360).

Almost surely, 2^206545728 is an apocalyptic number.

It is an amenable number.

206545728 is an abundant number, since it is smaller than the sum of its proper divisors (339940352).

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

206545728 is a wasteful number, since it uses less digits than its factorization.

206545728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1075774 (or 1075764 counting only the distinct ones).

The product of its (nonzero) digits is 134400, while the sum is 39.

The square root of 206545728 is about 14371.6988557373. The cubic root of 206545728 is about 591.1151255477.

The spelling of 206545728 in words is "two hundred six million, five hundred forty-five thousand, seven hundred twenty-eight".