169297668 has 72 divisors (see below), whose sum is σ = 449114400. Its totient is φ = 55135728.

The previous prime is 169297649. The next prime is 169297699. The reversal of 169297668 is 866792961.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1038555 + ... + 1038717.

It is an arithmetic number, because the mean of its divisors is an integer number (6237700).

Almost surely, 2^169297668 is an apocalyptic number.

169297668 is a gapful number since it is divisible by the number (18) 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 169297668, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (224557200).

169297668 is an abundant number, since it is smaller than the sum of its proper divisors (279816732).

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

169297668 is a wasteful number, since it uses less digits than its factorization.

169297668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 398 (or 227 counting only the distinct ones).

The product of its digits is 1959552, while the sum is 54.

The square root of 169297668 is about 13011.4437323458. The cubic root of 169297668 is about 553.2018943945.

The spelling of 169297668 in words is "one hundred sixty-nine million, two hundred ninety-seven thousand, six hundred sixty-eight".