169440 has 48 divisors (see below), whose sum is σ = 535248. Its totient is φ = 45056.

The previous prime is 169427. The next prime is 169457. The reversal of 169440 is 44961.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 169440.

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, 304 + ... + 656.

It is an arithmetic number, because the mean of its divisors is an integer number (11151).

2¹⁶⁹⁴⁴⁰ is an apocalyptic number.

169440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 169440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (267624).

169440 is an abundant number, since it is smaller than the sum of its proper divisors (365808).

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

169440 is a wasteful number, since it uses less digits than its factorization.

169440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 371 (or 363 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 169440 is about 411.6309026300. The cubic root of 169440 is about 55.3356880339.

The spelling of 169440 in words is "one hundred sixty-nine thousand, four hundred forty".