169820056 has 64 divisors (see below), whose sum is σ = 383745600. Its totient is φ = 68909568.

The previous prime is 169820041. The next prime is 169820069. The reversal of 169820056 is 650028961.

It is a junction number, because it is equal to n+sod(n) for n = 169819997 and 169820024.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 85086 + ... + 87058.

It is an arithmetic number, because the mean of its divisors is an integer number (5996025).

Almost surely, 2^169820056 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 169820056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (191872800).

169820056 is an abundant number, since it is smaller than the sum of its proper divisors (213925544).

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

169820056 is a wasteful number, since it uses less digits than its factorization.

169820056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2068 (or 2064 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 37.

The square root of 169820056 is about 13031.5024459960. The cubic root of 169820056 is about 553.7703001491.

The spelling of 169820056 in words is "one hundred sixty-nine million, eight hundred twenty thousand, fifty-six".