206078820 has 48 divisors (see below), whose sum is σ = 577704960. Its totient is φ = 54889216.

The previous prime is 206078819. The next prime is 206078837. The reversal of 206078820 is 28870602.

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, 70141 + ... + 73019.

It is an arithmetic number, because the mean of its divisors is an integer number (12035520).

Almost surely, 2^206078820 is an apocalyptic number.

206078820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

206078820 is an abundant number, since it is smaller than the sum of its proper divisors (371626140).

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

206078820 is a wasteful number, since it uses less digits than its factorization.

206078820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4084 (or 4082 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 33.

The square root of 206078820 is about 14355.4456566141. The cubic root of 206078820 is about 590.6693733913.

The spelling of 206078820 in words is "two hundred six million, seventy-eight thousand, eight hundred twenty".