168490 has 32 divisors (see below), whose sum is σ = 362880. Its totient is φ = 55104.

The previous prime is 168481. The next prime is 168491. The reversal of 168490 is 94861.

168490 is a nontrivial binomial coefficient, being equal to C(581, 2).

It is not an unprimeable number, because it can be changed into a prime (168491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1989 + ... + 2071.

It is an arithmetic number, because the mean of its divisors is an integer number (11340).

2¹⁶⁸⁴⁹⁰ is an apocalyptic number.

168490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

168490 is the 580-th triangular number.

168490 is the 194-th centered nonagonal number.

168490 is an abundant number, since it is smaller than the sum of its proper divisors (194390).

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

168490 is a wasteful number, since it uses less digits than its factorization.

168490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 168490 is about 410.4753342163. The cubic root of 168490 is about 55.2320772043.

The spelling of 168490 in words is "one hundred sixty-eight thousand, four hundred ninety".