168920392 has 16 divisors (see below), whose sum is σ = 325286460. Its totient is φ = 82177344.

The previous prime is 168920387. The next prime is 168920399. The reversal of 168920392 is 293029861.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 135349956 + 33570436 = 11634^2 + 5794^2 .

It is not an unprimeable number, because it can be changed into a prime (168920399) 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, 285043 + ... + 285634.

Almost surely, 2^168920392 is an apocalyptic number.

It is an amenable number.

168920392 is a deficient number, since it is larger than the sum of its proper divisors (156366068).

168920392 is a wasteful number, since it uses less digits than its factorization.

168920392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 570720 (or 570716 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 40.

The square root of 168920392 is about 12996.9377931881. The cubic root of 168920392 is about 552.7906561544.

The spelling of 168920392 in words is "one hundred sixty-eight million, nine hundred twenty thousand, three hundred ninety-two".