206670128 has 40 divisors (see below), whose sum is σ = 458304000. Its totient is φ = 88441920.

The previous prime is 206670127. The next prime is 206670131. The reversal of 206670128 is 821076602.

It is a junction number, because it is equal to n+sod(n) for n = 206670094 and 206670103.

It is not an unprimeable number, because it can be changed into a prime (206670127) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 137123 + ... + 138621.

It is an arithmetic number, because the mean of its divisors is an integer number (11457600).

Almost surely, 2^206670128 is an apocalyptic number.

206670128 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

206670128 is an abundant number, since it is smaller than the sum of its proper divisors (251633872).

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

206670128 is a wasteful number, since it uses less digits than its factorization.

206670128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2745 (or 2739 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 206670128 is about 14376.0261546785. The cubic root of 206670128 is about 591.2337755665.

The spelling of 206670128 in words is "two hundred six million, six hundred seventy thousand, one hundred twenty-eight".