172871280 has 160 divisors (see below), whose sum is σ = 600318720. Its totient is φ = 45722880.

The previous prime is 172871267. The next prime is 172871299. The reversal of 172871280 is 82178271.

It is a happy number.

172871280 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 351835 + ... + 352325.

It is an arithmetic number, because the mean of its divisors is an integer number (3751992).

Almost surely, 2^172871280 is an apocalyptic number.

172871280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 172871280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (300159360).

172871280 is an abundant number, since it is smaller than the sum of its proper divisors (427447440).

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

172871280 is a wasteful number, since it uses less digits than its factorization.

172871280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 676 (or 664 counting only the distinct ones).

The product of its (nonzero) digits is 12544, while the sum is 36.

The square root of 172871280 is about 13148.0523272460. The cubic root of 172871280 is about 557.0672357211.

The spelling of 172871280 in words is "one hundred seventy-two million, eight hundred seventy-one thousand, two hundred eighty".