164440 has 16 divisors (see below), whose sum is σ = 370080. Its totient is φ = 65760.

The previous prime is 164431. The next prime is 164443. The reversal of 164440 is 44461.

It is a super-3 number, since 3×164440³ = 13339626169152000, which contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (164443) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2016 + ... + 2095.

It is an arithmetic number, because the mean of its divisors is an integer number (23130).

2¹⁶⁴⁴⁴⁰ is an apocalyptic number.

164440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

164440 is an abundant number, since it is smaller than the sum of its proper divisors (205640).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

164440 is a wasteful number, since it uses less digits than its factorization.

164440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4122 (or 4118 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 164440 is about 405.5120220166. The cubic root of 164440 is about 54.7859448565.

The spelling of 164440 in words is "one hundred sixty-four thousand, four hundred forty".