172345388 has 12 divisors (see below), whose sum is σ = 319345992. Its totient is φ = 81103680.

The previous prime is 172345387. The next prime is 172345403. The reversal of 172345388 is 883543271.

It is not an unprimeable number, because it can be changed into a prime (172345387) 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 3 ways as a sum of consecutive naturals, for example, 1267178 + ... + 1267313.

It is an arithmetic number, because the mean of its divisors is an integer number (26612166).

Almost surely, 2^172345388 is an apocalyptic number.

It is an amenable number.

172345388 is a deficient number, since it is larger than the sum of its proper divisors (147000604).

172345388 is a wasteful number, since it uses less digits than its factorization.

172345388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2534512 (or 2534510 counting only the distinct ones).

The product of its digits is 161280, while the sum is 41.

The square root of 172345388 is about 13128.0382388230. The cubic root of 172345388 is about 556.5017768927.

It can be divided in two parts, 17234 and 5388, that added together give a palindrome (22622).

The spelling of 172345388 in words is "one hundred seventy-two million, three hundred forty-five thousand, three hundred eighty-eight".