168009426 has 24 divisors (see below), whose sum is σ = 392022540. Its totient is φ = 51695136.

The previous prime is 168009421. The next prime is 168009437. The reversal of 168009426 is 624900861.

It can be written as a sum of positive squares in 2 ways, for example, as 166797225 + 1212201 = 12915^2 + 1101^2 .

It is not an unprimeable number, because it can be changed into a prime (168009421) 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 11 ways as a sum of consecutive naturals, for example, 358761 + ... + 359228.

Almost surely, 2^168009426 is an apocalyptic number.

168009426 is an abundant number, since it is smaller than the sum of its proper divisors (224013114).

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

168009426 is a wasteful number, since it uses less digits than its factorization.

168009426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 718010 (or 718007 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 168009426 is about 12961.8450075597. The cubic root of 168009426 is about 551.7951547734.

The spelling of 168009426 in words is "one hundred sixty-eight million, nine thousand, four hundred twenty-six".