172485538 has 16 divisors (see below), whose sum is σ = 261465984. Its totient is φ = 85335120.

The previous prime is 172485493. The next prime is 172485539. The reversal of 172485538 is 835584271.

It is a junction number, because it is equal to n+sod(n) for n = 172485494 and 172485503.

It is not an unprimeable number, because it can be changed into a prime (172485539) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 84081 + ... + 86107.

It is an arithmetic number, because the mean of its divisors is an integer number (16341624).

Almost surely, 2^172485538 is an apocalyptic number.

172485538 is a deficient number, since it is larger than the sum of its proper divisors (88980446).

172485538 is a wasteful number, since it uses less digits than its factorization.

172485538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2457.

The product of its digits is 268800, while the sum is 43.

The square root of 172485538 is about 13133.3749660931. The cubic root of 172485538 is about 556.6525837370.

The spelling of 172485538 in words is "one hundred seventy-two million, four hundred eighty-five thousand, five hundred thirty-eight".