172838 has 8 divisors (see below), whose sum is σ = 262440. Its totient is φ = 85360.

The previous prime is 172829. The next prime is 172849. The reversal of 172838 is 838271.

172838 is an esthetic number in base 5, because in such base its adjacent digits differ by 1.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 172838.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 308 + ... + 663.

It is an arithmetic number, because the mean of its divisors is an integer number (32805).

2¹⁷²⁸³⁸ is an apocalyptic number.

172838 is a deficient number, since it is larger than the sum of its proper divisors (89602).

172838 is an equidigital number, since it uses as much as digits as its factorization.

172838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1062.

The product of its digits is 2688, while the sum is 29.

The square root of 172838 is about 415.7378982003. The cubic root of 172838 is about 55.7031485832.

The spelling of 172838 in words is "one hundred seventy-two thousand, eight hundred thirty-eight".