168943490 has 16 divisors (see below), whose sum is σ = 313908480. Its totient is φ = 65397360.

The previous prime is 168943471. The next prime is 168943499. The reversal of 168943490 is 94349861.

It is not an unprimeable number, because it can be changed into a prime (168943499) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 272180 + ... + 272799.

It is an arithmetic number, because the mean of its divisors is an integer number (19619280).

Almost surely, 2^168943490 is an apocalyptic number.

168943490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

168943490 is a deficient number, since it is larger than the sum of its proper divisors (144964990).

168943490 is a wasteful number, since it uses less digits than its factorization.

168943490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 545017.

The product of its (nonzero) digits is 186624, while the sum is 44.

The square root of 168943490 is about 12997.8263567413. The cubic root of 168943490 is about 552.8158510139.

The spelling of 168943490 in words is "one hundred sixty-eight million, nine hundred forty-three thousand, four hundred ninety".