206406528 has 64 divisors (see below), whose sum is σ = 549918720. Its totient is φ = 68595200.

The previous prime is 206406449. The next prime is 206406611. The reversal of 206406528 is 825604602.

It is a tau number, because it is divible by the number of its divisors (64).

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, 178753 + ... + 179903.

It is an arithmetic number, because the mean of its divisors is an integer number (8592480).

Almost surely, 2^206406528 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 206406528, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (274959360).

206406528 is an abundant number, since it is smaller than the sum of its proper divisors (343512192).

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

206406528 is a wasteful number, since it uses less digits than its factorization.

206406528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1635 (or 1623 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 33.

The square root of 206406528 is about 14366.8551882449. The cubic root of 206406528 is about 590.9823031167.

The spelling of 206406528 in words is "two hundred six million, four hundred six thousand, five hundred twenty-eight".