168520044 has 192 divisors, whose sum is σ = 535449600. Its totient is φ = 39916800.

The previous prime is 168520039. The next prime is 168520049. The reversal of 168520044 is 440025861.

It is an interprime number because it is at equal distance from previous prime (168520039) and next prime (168520049).

It is a junction number, because it is equal to n+sod(n) for n = 168519993 and 168520020.

It is not an unprimeable number, because it can be changed into a prime (168520049) 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 63 ways as a sum of consecutive naturals, for example, 508959 + ... + 509289.

It is an arithmetic number, because the mean of its divisors is an integer number (2788800).

Almost surely, 2^168520044 is an apocalyptic number.

168520044 is a gapful number since it is divisible by the number (14) 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 168520044, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (267724800).

168520044 is an abundant number, since it is smaller than the sum of its proper divisors (366929556).

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

168520044 is a wasteful number, since it uses less digits than its factorization.

168520044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 404 (or 402 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 30.

The square root of 168520044 is about 12981.5270288206. The cubic root of 168520044 is about 552.3535987960.

The spelling of 168520044 in words is "one hundred sixty-eight million, five hundred twenty thousand, forty-four".