206117028 has 48 divisors (see below), whose sum is σ = 575487360. Its totient is φ = 63420192.

The previous prime is 206117011. The next prime is 206117039. The reversal of 206117028 is 820711602.

206117028 is a `hidden beast` number, since 20 + 611 + 7 + 0 + 28 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 206116992 and 206117010.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 72000 + ... + 74807.

It is an arithmetic number, because the mean of its divisors is an integer number (11989320).

Almost surely, 2^206117028 is an apocalyptic number.

It is an amenable number.

206117028 is an abundant number, since it is smaller than the sum of its proper divisors (369370332).

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

206117028 is a wasteful number, since it uses less digits than its factorization.

206117028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146833 (or 146825 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 27.

The square root of 206117028 is about 14356.7763791180. The cubic root of 206117028 is about 590.7058754456.

The spelling of 206117028 in words is "two hundred six million, one hundred seventeen thousand, twenty-eight".