206772728 has 32 divisors (see below), whose sum is σ = 401520000. Its totient is φ = 99722880.

The previous prime is 206772707. The next prime is 206772743. The reversal of 206772728 is 827277602.

206772728 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×206772728² = 85509922089123968, which contains 22 as substring.

It is a congruent number.

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, 85358 + ... + 87746.

It is an arithmetic number, because the mean of its divisors is an integer number (12547500).

Almost surely, 2^206772728 is an apocalyptic number.

It is an amenable number.

206772728 is a deficient number, since it is larger than the sum of its proper divisors (194747272).

206772728 is a wasteful number, since it uses less digits than its factorization.

206772728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2775 (or 2771 counting only the distinct ones).

The product of its (nonzero) digits is 131712, while the sum is 41.

The square root of 206772728 is about 14379.5941528264. The cubic root of 206772728 is about 591.3315973959.

The spelling of 206772728 in words is "two hundred six million, seven hundred seventy-two thousand, seven hundred twenty-eight".