168485990 has 8 divisors (see below), whose sum is σ = 303274800. Its totient is φ = 67394392.

The previous prime is 168485981. The next prime is 168486001. The reversal of 168485990 is 99584861.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8424290 + ... + 8424309.

It is an arithmetic number, because the mean of its divisors is an integer number (37909350).

Almost surely, 2^168485990 is an apocalyptic number.

168485990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

168485990 is a deficient number, since it is larger than the sum of its proper divisors (134788810).

168485990 is a wasteful number, since it uses less digits than its factorization.

168485990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16848606.

The product of its (nonzero) digits is 622080, while the sum is 50.

The square root of 168485990 is about 12980.2153294928. The cubic root of 168485990 is about 552.3163903308.

The spelling of 168485990 in words is "one hundred sixty-eight million, four hundred eighty-five thousand, nine hundred ninety".