169172928 has 112 divisors (see below), whose sum is σ = 508162560. Its totient is φ = 55164672.

The previous prime is 169172911. The next prime is 169172951. The reversal of 169172928 is 829271961.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 80175 + ... + 82257.

Almost surely, 2^169172928 is an apocalyptic number.

169172928 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 169172928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (254081280).

169172928 is an abundant number, since it is smaller than the sum of its proper divisors (338989632).

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

169172928 is a wasteful number, since it uses less digits than its factorization.

169172928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2151 (or 2135 counting only the distinct ones).

The product of its digits is 108864, while the sum is 45.

The square root of 169172928 is about 13006.6493763767. The cubic root of 169172928 is about 553.0659930159.

The spelling of 169172928 in words is "one hundred sixty-nine million, one hundred seventy-two thousand, nine hundred twenty-eight".