68398408 has 32 divisors (see below), whose sum is σ = 140729400. Its totient is φ = 30970368.

The previous prime is 68398397. The next prime is 68398411. The reversal of 68398408 is 80489386.

It can be written as a sum of positive squares in 4 ways, for example, as 34316164 + 34082244 = 5858^2 + 5838^2 .

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 7 ways as a sum of consecutive naturals, for example, 693 + ... + 11716.

Almost surely, 2^68398408 is an apocalyptic number.

It is an amenable number.

68398408 is an abundant number, since it is smaller than the sum of its proper divisors (72330992).

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

68398408 is a wasteful number, since it uses less digits than its factorization.

68398408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12481 (or 12477 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 46.

The square root of 68398408 is about 8270.3330041782. Note that the first 3 decimals coincide. The cubic root of 68398408 is about 408.9610976802.

The spelling of 68398408 in words is "sixty-eight million, three hundred ninety-eight thousand, four hundred eight".