169389056 has 44 divisors (see below), whose sum is σ = 342864312. Its totient is φ = 83632128.

The previous prime is 169389041. The next prime is 169389067. The reversal of 169389056 is 650983961.

It is a super-2 number, since 2×169389056² = 57385304585142272, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 169389056.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 83996 + ... + 85988.

Almost surely, 2^169389056 is an apocalyptic number.

169389056 is a gapful number since it is divisible by the number (16) 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 169389056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (171432156).

169389056 is an abundant number, since it is smaller than the sum of its proper divisors (173475256).

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

169389056 is an equidigital number, since it uses as much as digits as its factorization.

169389056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2096 (or 2078 counting only the distinct ones).

The product of its (nonzero) digits is 349920, while the sum is 47.

The square root of 169389056 is about 13014.9550902030. The cubic root of 169389056 is about 553.3014171685.

The spelling of 169389056 in words is "one hundred sixty-nine million, three hundred eighty-nine thousand, fifty-six".