172064328 has 64 divisors (see below), whose sum is σ = 443741760. Its totient is φ = 55566336.

The previous prime is 172064317. The next prime is 172064339. The reversal of 172064328 is 823460271.

It is an interprime number because it is at equal distance from previous prime (172064317) and next prime (172064339).

It is a super-2 number, since 2×172064328² = 59212265940183168, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 140776 + ... + 141992.

It is an arithmetic number, because the mean of its divisors is an integer number (6933465).

Almost surely, 2^172064328 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 172064328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (221870880).

172064328 is an abundant number, since it is smaller than the sum of its proper divisors (271677432).

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

172064328 is a wasteful number, since it uses less digits than its factorization.

172064328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1406 (or 1402 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 33.

The square root of 172064328 is about 13117.3293013479. The cubic root of 172064328 is about 556.1990988562.

The spelling of 172064328 in words is "one hundred seventy-two million, sixty-four thousand, three hundred twenty-eight".