172406528 has 144 divisors (see below), whose sum is σ = 423843840. Its totient is φ = 68395008.

The previous prime is 172406527. The next prime is 172406561. The reversal of 172406528 is 825604271.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172406527) by changing a digit.

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, 1937108 + ... + 1937196.

It is an arithmetic number, because the mean of its divisors is an integer number (2943360).

Almost surely, 2^172406528 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 172406528, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (211921920).

172406528 is an abundant number, since it is smaller than the sum of its proper divisors (251437312).

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

172406528 is an equidigital number, since it uses as much as digits as its factorization.

172406528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182 (or 168 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 35.

The square root of 172406528 is about 13130.3666361606. The cubic root of 172406528 is about 556.5675759574.

The spelling of 172406528 in words is "one hundred seventy-two million, four hundred six thousand, five hundred twenty-eight".