172388 has 12 divisors (see below), whose sum is σ = 306432. Its totient is φ = 84840.

The previous prime is 172373. The next prime is 172399. The reversal of 172388 is 883271.

It is a self number, because there is not a number n which added to its sum of digits gives 172388.

It is an unprimeable number.

172388 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20 + ... + 587.

It is an arithmetic number, because the mean of its divisors is an integer number (25536).

2¹⁷²³⁸⁸ is an apocalyptic number.

It is an amenable number.

172388 is a deficient number, since it is larger than the sum of its proper divisors (134044).

172388 is a wasteful number, since it uses less digits than its factorization.

172388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 682 (or 680 counting only the distinct ones).

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

The square root of 172388 is about 415.1963390975. The cubic root of 172388 is about 55.6547637707.

The spelling of 172388 in words is "one hundred seventy-two thousand, three hundred eighty-eight".