168929820 has 96 divisors (see below), whose sum is σ = 527788800. Its totient is φ = 44857152.

The previous prime is 168929809. The next prime is 168929821. The reversal of 168929820 is 28929861.

168929820 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168929821) 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 31 ways as a sum of consecutive naturals, for example, 165271 + ... + 166289.

It is an arithmetic number, because the mean of its divisors is an integer number (5497800).

Almost surely, 2^168929820 is an apocalyptic number.

168929820 is a gapful number since it is divisible by the number (10) 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 168929820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (263894400).

168929820 is an abundant number, since it is smaller than the sum of its proper divisors (358858980).

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

168929820 is a wasteful number, since it uses less digits than its factorization.

168929820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1344 (or 1336 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 45.

The square root of 168929820 is about 12997.3004889477. The cubic root of 168929820 is about 552.8009403150.

The spelling of 168929820 in words is "one hundred sixty-eight million, nine hundred twenty-nine thousand, eight hundred twenty".