172071324 has 96 divisors (see below), whose sum is σ = 461260800. Its totient is φ = 55442880.

The previous prime is 172071323. The next prime is 172071329. The reversal of 172071324 is 423170271.

It is a happy number.

It is a super-2 number, since 2×172071324² = 59217081086225952, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172071323) 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, 553129 + ... + 553439.

It is an arithmetic number, because the mean of its divisors is an integer number (4804800).

Almost surely, 2^172071324 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 172071324, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (230630400).

172071324 is an abundant number, since it is smaller than the sum of its proper divisors (289189476).

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

172071324 is a wasteful number, since it uses less digits than its factorization.

172071324 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 480 (or 472 counting only the distinct ones).

The product of its (nonzero) digits is 2352, while the sum is 27.

The square root of 172071324 is about 13117.5959687742. The cubic root of 172071324 is about 556.2066369597.

The spelling of 172071324 in words is "one hundred seventy-two million, seventy-one thousand, three hundred twenty-four".