168405472 has 24 divisors (see below), whose sum is σ = 333544176. Its totient is φ = 83695872.

The previous prime is 168405467. The next prime is 168405499. The reversal of 168405472 is 274504861.

It is a Smith number, since the sum of its digits (37) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 10413 + ... + 21100.

It is an arithmetic number, because the mean of its divisors is an integer number (13897674).

Almost surely, 2^168405472 is an apocalyptic number.

It is an amenable number.

168405472 is a deficient number, since it is larger than the sum of its proper divisors (165138704).

168405472 is a wasteful number, since it uses less digits than its factorization.

168405472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31690 (or 31682 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 37.

The square root of 168405472 is about 12977.1133924305. The cubic root of 168405472 is about 552.2283939002.

The spelling of 168405472 in words is "one hundred sixty-eight million, four hundred five thousand, four hundred seventy-two".