172312608 has 48 divisors (see below), whose sum is σ = 487118016. Its totient is φ = 53018880.

The previous prime is 172312583. The next prime is 172312639. The reversal of 172312608 is 806213271.

It is a tau number, because it is divible by the number of its divisors (48).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67788 + ... + 70283.

It is an arithmetic number, because the mean of its divisors is an integer number (10148292).

Almost surely, 2^172312608 is an apocalyptic number.

It is an amenable number.

172312608 is an abundant number, since it is smaller than the sum of its proper divisors (314805408).

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

172312608 is a wasteful number, since it uses less digits than its factorization.

172312608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138097 (or 138089 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 30.

The square root of 172312608 is about 13126.7897065505. The cubic root of 172312608 is about 556.4664925428.

Adding to 172312608 its reverse (806213271), we get a palindrome (978525879).

The spelling of 172312608 in words is "one hundred seventy-two million, three hundred twelve thousand, six hundred eight".