172529028 has 72 divisors (see below), whose sum is σ = 516897472. Its totient is φ = 49292064.

The previous prime is 172529011. The next prime is 172529041. The reversal of 172529028 is 820925271.

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

It is a junction number, because it is equal to n+sod(n) for n = 172528983 and 172529001.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5875 + ... + 19482.

Almost surely, 2^172529028 is an apocalyptic number.

172529028 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

172529028 is an abundant number, since it is smaller than the sum of its proper divisors (344368444).

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

172529028 is a wasteful number, since it uses less digits than its factorization.

172529028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25383 (or 25369 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

The square root of 172529028 is about 13135.0305671513. The cubic root of 172529028 is about 556.6993640580.

The spelling of 172529028 in words is "one hundred seventy-two million, five hundred twenty-nine thousand, twenty-eight".