204728730 has 32 divisors (see below), whose sum is σ = 491984064. Its totient is φ = 54523776.

The previous prime is 204728729. The next prime is 204728731. The reversal of 204728730 is 37827402.

It is an interprime number because it is at equal distance from previous prime (204728729) and next prime (204728731).

It is a junction number, because it is equal to n+sod(n) for n = 204728691 and 204728700.

It is not an unprimeable number, because it can be changed into a prime (204728731) 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, 21729 + ... + 29691.

It is an arithmetic number, because the mean of its divisors is an integer number (15374502).

Almost surely, 2^204728730 is an apocalyptic number.

204728730 is an abundant number, since it is smaller than the sum of its proper divisors (287255334).

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

204728730 is a wasteful number, since it uses less digits than its factorization.

204728730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8830.

The product of its (nonzero) digits is 18816, while the sum is 33.

The square root of 204728730 is about 14308.3447680016. The cubic root of 204728730 is about 589.3766566086.

The spelling of 204728730 in words is "two hundred four million, seven hundred twenty-eight thousand, seven hundred thirty".