168190140 has 48 divisors (see below), whose sum is σ = 487176480. Its totient is φ = 43303680.

The previous prime is 168190133. The next prime is 168190171. The reversal of 168190140 is 41091861.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 168190098 and 168190107.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46591 + ... + 50070.

It is an arithmetic number, because the mean of its divisors is an integer number (10149510).

Almost surely, 2^168190140 is an apocalyptic number.

168190140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

168190140 is an abundant number, since it is smaller than the sum of its proper divisors (318986340).

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

168190140 is a wasteful number, since it uses less digits than its factorization.

168190140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96702 (or 96700 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 30.

The square root of 168190140 is about 12968.8141323715. The cubic root of 168190140 is about 551.9929241899.

The spelling of 168190140 in words is "one hundred sixty-eight million, one hundred ninety thousand, one hundred forty".