169040 has 20 divisors (see below), whose sum is σ = 393204. Its totient is φ = 67584.

The previous prime is 169019. The next prime is 169049. The reversal of 169040 is 40961.

It can be written as a sum of positive squares in 2 ways, for example, as 18496 + 150544 = 136^2 + 388^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a Smith number, since the sum of its digits (20) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (169049) 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, 977 + ... + 1136.

2¹⁶⁹⁰⁴⁰ is an apocalyptic number.

169040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

169040 is an abundant number, since it is smaller than the sum of its proper divisors (224164).

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

169040 is a wasteful number, since it uses less digits than its factorization.

169040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2126 (or 2120 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 169040 is about 411.1447433690. The cubic root of 169040 is about 55.2921097452.

It can be divided in two parts, 1690 and 40, that multiplied together give a square (67600 = 260²).

The spelling of 169040 in words is "one hundred sixty-nine thousand, forty".