206509828 has 24 divisors (see below), whose sum is σ = 415800000. Its totient is φ = 87908448.

The previous prime is 206509813. The next prime is 206509837. The reversal of 206509828 is 828905602.

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, 20578 + ... + 28921.

It is an arithmetic number, because the mean of its divisors is an integer number (17325000).

Almost surely, 2^206509828 is an apocalyptic number.

206509828 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

206509828 is an abundant number, since it is smaller than the sum of its proper divisors (209290172).

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

206509828 is a wasteful number, since it uses less digits than its factorization.

206509828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49659 (or 49657 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 40.

The square root of 206509828 is about 14370.4498189862. The cubic root of 206509828 is about 591.0808760496.

The spelling of 206509828 in words is "two hundred six million, five hundred nine thousand, eight hundred twenty-eight".