172438280 has 64 divisors (see below), whose sum is σ = 445530240. Its totient is φ = 58839552.

The previous prime is 172438267. The next prime is 172438307. The reversal of 172438280 is 82834271.

172438280 is digitally balanced in base 3, 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 (35).

It is a self number, because there is not a number n which added to its sum of digits gives 172438280.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 62204 + ... + 64916.

It is an arithmetic number, because the mean of its divisors is an integer number (6961410).

Almost surely, 2^172438280 is an apocalyptic number.

172438280 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 172438280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (222765120).

172438280 is an abundant number, since it is smaller than the sum of its proper divisors (273091960).

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

172438280 is a wasteful number, since it uses less digits than its factorization.

172438280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2958 (or 2954 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 35.

The square root of 172438280 is about 13131.5756861087. The cubic root of 172438280 is about 556.6017414249.

It can be divided in two parts, 1724 and 38280, that added together give a palindrome (40004).

The spelling of 172438280 in words is "one hundred seventy-two million, four hundred thirty-eight thousand, two hundred eighty".