168549992 has 48 divisors (see below), whose sum is σ = 347334540. Its totient is φ = 76211712.

The previous prime is 168549991. The next prime is 168550021. The reversal of 168549992 is 299945861.

168549992 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 6 ways, for example, as 5885476 + 162664516 = 2426^2 + 12754^2 .

It is not an unprimeable number, because it can be changed into a prime (168549991) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1131134 + ... + 1131282.

Almost surely, 2^168549992 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 168549992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (173667270).

168549992 is an abundant number, since it is smaller than the sum of its proper divisors (178784548).

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

168549992 is a wasteful number, since it uses less digits than its factorization.

168549992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 390 (or 237 counting only the distinct ones).

The product of its digits is 1399680, while the sum is 53.

The square root of 168549992 is about 12982.6804628320. The cubic root of 168549992 is about 552.3863167750.

The spelling of 168549992 in words is "one hundred sixty-eight million, five hundred forty-nine thousand, nine hundred ninety-two".