172404415 has 16 divisors (see below), whose sum is σ = 212179968. Its totient is φ = 134408736.

The previous prime is 172404409. The next prime is 172404433. The reversal of 172404415 is 514404271.

It is a cyclic number.

It is not a de Polignac number, because 172404415 - 2⁵ = 172404383 is a prime.

It is a super-2 number, since 2×172404415² = 59446564622984450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 155754 + ... + 156856.

It is an arithmetic number, because the mean of its divisors is an integer number (13261248).

Almost surely, 2^172404415 is an apocalyptic number.

172404415 is a deficient number, since it is larger than the sum of its proper divisors (39775553).

172404415 is a wasteful number, since it uses less digits than its factorization.

172404415 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1878.

The product of its (nonzero) digits is 4480, while the sum is 28.

The square root of 172404415 is about 13130.2861735760. The cubic root of 172404415 is about 556.5653021996.

Adding to 172404415 its reverse (514404271), we get a palindrome (686808686).

The spelling of 172404415 in words is "one hundred seventy-two million, four hundred four thousand, four hundred fifteen".