168649344 has 64 divisors (see below), whose sum is σ = 497760000. Its totient is φ = 56215296.

The previous prime is 168649343. The next prime is 168649357. The reversal of 168649344 is 443946861.

It is a tau number, because it is divible by the number of its divisors (64).

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 168649344.

It is not an unprimeable number, because it can be changed into a prime (168649343) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20944 + ... + 27855.

It is an arithmetic number, because the mean of its divisors is an integer number (7777500).

Almost surely, 2^168649344 is an apocalyptic number.

It is an amenable number.

168649344 is an abundant number, since it is smaller than the sum of its proper divisors (329110656).

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

168649344 is an equidigital number, since it uses as much as digits as its factorization.

168649344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48822 (or 48804 counting only the distinct ones).

The product of its digits is 497664, while the sum is 45.

The square root of 168649344 is about 12986.5062276195. The cubic root of 168649344 is about 552.4948303878.

The spelling of 168649344 in words is "one hundred sixty-eight million, six hundred forty-nine thousand, three hundred forty-four".