168135432 has 16 divisors (see below), whose sum is σ = 420338640. Its totient is φ = 56045136.

The previous prime is 168135421. The next prime is 168135439. The reversal of 168135432 is 234531861.

It is a junction number, because it is equal to n+sod(n) for n = 168135393 and 168135402.

It is not an unprimeable number, because it can be changed into a prime (168135439) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3502798 + ... + 3502845.

It is an arithmetic number, because the mean of its divisors is an integer number (26271165).

Almost surely, 2^168135432 is an apocalyptic number.

168135432 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

168135432 is an abundant number, since it is smaller than the sum of its proper divisors (252203208).

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

168135432 is a wasteful number, since it uses less digits than its factorization.

168135432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7005652 (or 7005648 counting only the distinct ones).

The product of its digits is 17280, while the sum is 33.

The square root of 168135432 is about 12966.7047471592. The cubic root of 168135432 is about 551.9330679190.

The spelling of 168135432 in words is "one hundred sixty-eight million, one hundred thirty-five thousand, four hundred thirty-two".