168405332 has 24 divisors (see below), whose sum is σ = 314340264. Its totient is φ = 78666752.

The previous prime is 168405331. The next prime is 168405353. The reversal of 168405332 is 233504861.

It can be written as a sum of positive squares in 4 ways, for example, as 102535876 + 65869456 = 10126^2 + 8116^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168405331) 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 7 ways as a sum of consecutive naturals, for example, 278 + ... + 18354.

It is an arithmetic number, because the mean of its divisors is an integer number (13097511).

Almost surely, 2^168405332 is an apocalyptic number.

It is an amenable number.

168405332 is a deficient number, since it is larger than the sum of its proper divisors (145934932).

168405332 is a wasteful number, since it uses less digits than its factorization.

168405332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18235 (or 18233 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 32.

The square root of 168405332 is about 12977.1079983177. The cubic root of 168405332 is about 552.2282408727.

The spelling of 168405332 in words is "one hundred sixty-eight million, four hundred five thousand, three hundred thirty-two".