172040504 has 8 divisors (see below), whose sum is σ = 322575960. Its totient is φ = 86020248.

The previous prime is 172040431. The next prime is 172040507. The reversal of 172040504 is 405040271.

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 172040504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172040507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10752524 + ... + 10752539.

It is an arithmetic number, because the mean of its divisors is an integer number (40321995).

Almost surely, 2^172040504 is an apocalyptic number.

It is an amenable number.

172040504 is a deficient number, since it is larger than the sum of its proper divisors (150535456).

172040504 is a wasteful number, since it uses less digits than its factorization.

172040504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21505069 (or 21505065 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 23.

The square root of 172040504 is about 13116.4211582276. The cubic root of 172040504 is about 556.1734272578.

Adding to 172040504 its reverse (405040271), we get a palindrome (577080775).

It can be divided in two parts, 1720 and 40504, that added together give a palindrome (42224).

The spelling of 172040504 in words is "one hundred seventy-two million, forty thousand, five hundred four".