169399872 has 168 divisors, whose sum is σ = 513527040. Its totient is φ = 53314560.

The previous prime is 169399861. The next prime is 169399907. The reversal of 169399872 is 278993961.

169399872 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 946279 + ... + 946457.

Almost surely, 2^169399872 is an apocalyptic number.

169399872 is a gapful number since it is divisible by the number (12) 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 169399872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (256763520).

169399872 is an abundant number, since it is smaller than the sum of its proper divisors (344127168).

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

169399872 is a wasteful number, since it uses less digits than its factorization.

169399872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 281 (or 268 counting only the distinct ones).

The product of its digits is 1469664, while the sum is 54.

The square root of 169399872 is about 13015.3706055571. The cubic root of 169399872 is about 553.3131935703.

The spelling of 169399872 in words is "one hundred sixty-nine million, three hundred ninety-nine thousand, eight hundred seventy-two".