166834728 has 80 divisors (see below), whose sum is σ = 473352000. Its totient is φ = 54890784.

The previous prime is 166834727. The next prime is 166834747. The reversal of 166834728 is 827438661.

It is not an unprimeable number, because it can be changed into a prime (166834727) by changing a digit.

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 19 ways as a sum of consecutive naturals, for example, 49563 + ... + 52821.

It is an arithmetic number, because the mean of its divisors is an integer number (5916900).

Almost surely, 2^166834728 is an apocalyptic number.

166834728 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 166834728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (236676000).

166834728 is an abundant number, since it is smaller than the sum of its proper divisors (306517272).

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

166834728 is a wasteful number, since it uses less digits than its factorization.

166834728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3356 (or 3343 counting only the distinct ones).

The product of its digits is 387072, while the sum is 45.

The square root of 166834728 is about 12916.4518347726. The cubic root of 166834728 is about 550.5061214415.

The spelling of 166834728 in words is "one hundred sixty-six million, eight hundred thirty-four thousand, seven hundred twenty-eight".