164390 has 16 divisors (see below), whose sum is σ = 313632. Its totient is φ = 61824.

The previous prime is 164387. The next prime is 164413. The reversal of 164390 is 93461.

164390 is nontrivially palindromic in base 13.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 314 + ... + 653.

It is an arithmetic number, because the mean of its divisors is an integer number (19602).

2¹⁶⁴³⁹⁰ is an apocalyptic number.

164390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

164390 is a deficient number, since it is larger than the sum of its proper divisors (149242).

164390 is a wasteful number, since it uses less digits than its factorization.

164390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 991.

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 164390 is about 405.4503668761. The cubic root of 164390 is about 54.7803915140.

The spelling of 164390 in words is "one hundred sixty-four thousand, three hundred ninety".