168140492 has 48 divisors (see below), whose sum is σ = 335559840. Its totient is φ = 73156608.

The previous prime is 168140471. The next prime is 168140509. The reversal of 168140492 is 294041861.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 63548 + ... + 66140.

It is an arithmetic number, because the mean of its divisors is an integer number (6990830).

Almost surely, 2^168140492 is an apocalyptic number.

It is an amenable number.

168140492 is a deficient number, since it is larger than the sum of its proper divisors (167419348).

168140492 is a wasteful number, since it uses less digits than its factorization.

168140492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2682 (or 2680 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 35.

The square root of 168140492 is about 12966.8998607994. The cubic root of 168140492 is about 551.9386046328.

The spelling of 168140492 in words is "one hundred sixty-eight million, one hundred forty thousand, four hundred ninety-two".