206945580 has 48 divisors (see below), whose sum is σ = 588107520. Its totient is φ = 54360768.

The previous prime is 206945569. The next prime is 206945581. The reversal of 206945580 is 85549602.

It is not an unprimeable number, because it can be changed into a prime (206945581) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21720 + ... + 29759.

It is an arithmetic number, because the mean of its divisors is an integer number (12252240).

Almost surely, 2^206945580 is an apocalyptic number.

206945580 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

206945580 is an abundant number, since it is smaller than the sum of its proper divisors (381161940).

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

206945580 is a wasteful number, since it uses less digits than its factorization.

206945580 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51558 (or 51556 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 39.

The square root of 206945580 is about 14385.6032198862. The cubic root of 206945580 is about 591.4963263744.

The spelling of 206945580 in words is "two hundred six million, nine hundred forty-five thousand, five hundred eighty".