206865330 has 64 divisors (see below), whose sum is σ = 579502080. Its totient is φ = 46275264.

The previous prime is 206865301. The next prime is 206865341. The reversal of 206865330 is 33568602.

It is a junction number, because it is equal to n+sod(n) for n = 206865291 and 206865300.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 610 + ... + 20349.

It is an arithmetic number, because the mean of its divisors is an integer number (9054720).

Almost surely, 2^206865330 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 206865330, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (289751040).

206865330 is an abundant number, since it is smaller than the sum of its proper divisors (372636750).

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

206865330 is a wasteful number, since it uses less digits than its factorization.

206865330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21023.

The product of its (nonzero) digits is 25920, while the sum is 33.

The square root of 206865330 is about 14382.8137024714. The cubic root of 206865330 is about 591.4198590616.

The spelling of 206865330 in words is "two hundred six million, eight hundred sixty-five thousand, three hundred thirty".