168704532 has 120 divisors (see below), whose sum is σ = 472930920. Its totient is φ = 52254720.

The previous prime is 168704531. The next prime is 168704539. The reversal of 168704532 is 235407861.

It can be written as a sum of positive squares in 4 ways, for example, as 75272976 + 93431556 = 8676^2 + 9666^2 .

It is a super-2 number, since 2×168704532² = 56922438234678048, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168704531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 600232 + ... + 600512.

It is an arithmetic number, because the mean of its divisors is an integer number (3941091).

Almost surely, 2^168704532 is an apocalyptic number.

168704532 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 168704532, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (236465460).

168704532 is an abundant number, since it is smaller than the sum of its proper divisors (304226388).

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

168704532 is a wasteful number, since it uses less digits than its factorization.

168704532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 423 (or 412 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 36.

The square root of 168704532 is about 12988.6308747304. The cubic root of 168704532 is about 552.5550890655. Note that the first 3 decimals are identical.

The spelling of 168704532 in words is "one hundred sixty-eight million, seven hundred four thousand, five hundred thirty-two".