206420730 has 16 divisors (see below), whose sum is σ = 495409824. Its totient is φ = 55045520.

The previous prime is 206420729. The next prime is 206420771. The reversal of 206420730 is 37024602.

It is a self number, because there is not a number n which added to its sum of digits gives 206420730.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3440316 + ... + 3440375.

It is an arithmetic number, because the mean of its divisors is an integer number (30963114).

Almost surely, 2^206420730 is an apocalyptic number.

206420730 is an abundant number, since it is smaller than the sum of its proper divisors (288989094).

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

206420730 is a wasteful number, since it uses less digits than its factorization.

206420730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6880701.

The product of its (nonzero) digits is 2016, while the sum is 24.

The square root of 206420730 is about 14367.3494423989. The cubic root of 206420730 is about 590.9958571748.

The spelling of 206420730 in words is "two hundred six million, four hundred twenty thousand, seven hundred thirty".