172389800208 has 40 divisors (see below), whose sum is σ = 446354814400. Its totient is φ = 57332363904.

The previous prime is 172389800159. The next prime is 172389800221. The reversal of 172389800208 is 802008983271.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4069423 + ... + 4111566.

It is an arithmetic number, because the mean of its divisors is an integer number (11158870360).

Almost surely, 2^172389800208 is an apocalyptic number.

It is an amenable number.

172389800208 is an abundant number, since it is smaller than the sum of its proper divisors (273965014192).

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

172389800208 is a wasteful number, since it uses less digits than its factorization.

172389800208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8181439 (or 8181433 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 48.

The spelling of 172389800208 in words is "one hundred seventy-two billion, three hundred eighty-nine million, eight hundred thousand, two hundred eight".