173428505 has 16 divisors (see below), whose sum is σ = 211766400. Its totient is φ = 136321920.

The previous prime is 173428501. The next prime is 173428511. The reversal of 173428505 is 505824371.

It is a happy number.

173428505 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 173428505 - 2² = 173428501 is a prime.

It is not an unprimeable number, because it can be changed into a prime (173428501) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 133901 + ... + 135189.

It is an arithmetic number, because the mean of its divisors is an integer number (13235400).

Almost surely, 2^173428505 is an apocalyptic number.

It is an amenable number.

173428505 is a deficient number, since it is larger than the sum of its proper divisors (38337895).

173428505 is a wasteful number, since it uses less digits than its factorization.

173428505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1744.

The product of its (nonzero) digits is 33600, while the sum is 35.

The square root of 173428505 is about 13169.2256795910. The cubic root of 173428505 is about 557.6651350449.

The spelling of 173428505 in words is "one hundred seventy-three million, four hundred twenty-eight thousand, five hundred five".