172008020838 has 16 divisors (see below), whose sum is σ = 344043627840. Its totient is φ = 57331409256.

The previous prime is 172008020809. The next prime is 172008020839. The reversal of 172008020838 is 838020800271.

It is a junction number, because it is equal to n+sod(n) for n = 172008020796 and 172008020805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172008020839) by changing a digit.

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, 1067920 + ... + 1218387.

It is an arithmetic number, because the mean of its divisors is an integer number (21502726740).

Almost surely, 2^172008020838 is an apocalyptic number.

172008020838 is an abundant number, since it is smaller than the sum of its proper divisors (172035607002).

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

172008020838 is a wasteful number, since it uses less digits than its factorization.

172008020838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2298851.

The product of its (nonzero) digits is 43008, while the sum is 39.

The spelling of 172008020838 in words is "one hundred seventy-two billion, eight million, twenty thousand, eight hundred thirty-eight".