208573328730 has 64 divisors (see below), whose sum is σ = 539747365248. Its totient is φ = 51277743360.

The previous prime is 208573328699. The next prime is 208573328737. The reversal of 208573328730 is 37823375802.

It is a self number, because there is not a number n which added to its sum of digits gives 208573328730.

It is not an unprimeable number, because it can be changed into a prime (208573328737) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13429 + ... + 646008.

It is an arithmetic number, because the mean of its divisors is an integer number (8433552582).

Almost surely, 2^208573328730 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 208573328730, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (269873682624).

208573328730 is an abundant number, since it is smaller than the sum of its proper divisors (331174036518).

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

208573328730 is a wasteful number, since it uses less digits than its factorization.

208573328730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 660271.

The product of its (nonzero) digits is 1693440, while the sum is 48.

The spelling of 208573328730 in words is "two hundred eight billion, five hundred seventy-three million, three hundred twenty-eight thousand, seven hundred thirty".