169040000 has 80 divisors (see below), whose sum is σ = 421013670. Its totient is φ = 67584000.

The previous prime is 169039999. The next prime is 169040029. The reversal of 169040000 is 40961.

It can be written as a sum of positive squares in 5 ways, for example, as 11888704 + 157151296 = 3448^2 + 12536^2 .

It is a tau number, because it is divible by the number of its divisors (80).

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

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 78944 + ... + 81056.

Almost surely, 2^169040000 is an apocalyptic number.

169040000 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 169040000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (210506835).

169040000 is an abundant number, since it is smaller than the sum of its proper divisors (251973670).

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

169040000 is an frugal number, since it uses more digits than its factorization.

169040000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2147 (or 2120 counting only the distinct ones).

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

The square root of 169040000 is about 13001.5383705160. The cubic root of 169040000 is about 552.9210974521.

Adding to 169040000 its reverse (40961), we get a palindrome (169080961).

The spelling of 169040000 in words is "one hundred sixty-nine million, forty thousand".