168193332 has 18 divisors (see below), whose sum is σ = 425155458. Its totient is φ = 56064432.

The previous prime is 168193303. The next prime is 168193349. The reversal of 168193332 is 233391861.

168193332 is digitally balanced in base 3, 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 only one way, i.e., 168117156 + 76176 = 12966^2 + 276^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 4672037 = 168193332 / (1 + 6 + 8 + 1 + 9 + 3 + 3 + 3 + 2).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2335983 + ... + 2336054.

Almost surely, 2^168193332 is an apocalyptic number.

168193332 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

168193332 is an abundant number, since it is smaller than the sum of its proper divisors (256962126).

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

168193332 is a wasteful number, since it uses less digits than its factorization.

168193332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4672047 (or 4672042 counting only the distinct ones).

The product of its digits is 23328, while the sum is 36.

The square root of 168193332 is about 12968.9371962393. The cubic root of 168193332 is about 551.9964161708.

The spelling of 168193332 in words is "one hundred sixty-eight million, one hundred ninety-three thousand, three hundred thirty-two".