169297920 has 288 divisors, whose sum is σ = 643930560. Its totient is φ = 40796160.

The previous prime is 169297879. The next prime is 169297927. The reversal of 169297920 is 29792961.

It is a tau number, because it is divible by the number of its divisors (288).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (169297927) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1013677 + ... + 1013843.

It is an arithmetic number, because the mean of its divisors is an integer number (2235870).

Almost surely, 2^169297920 is an apocalyptic number.

169297920 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 169297920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (321965280).

169297920 is an abundant number, since it is smaller than the sum of its proper divisors (474632640).

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

169297920 is a wasteful number, since it uses less digits than its factorization.

169297920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211 (or 188 counting only the distinct ones).

The product of its (nonzero) digits is 122472, while the sum is 45.

The square root of 169297920 is about 13011.4534161253. The cubic root of 169297920 is about 553.2021688752.

The spelling of 169297920 in words is "one hundred sixty-nine million, two hundred ninety-seven thousand, nine hundred twenty".