68304578 has 4 divisors (see below), whose sum is σ = 102456870. Its totient is φ = 34152288.

The previous prime is 68304571. The next prime is 68304581. The reversal of 68304578 is 87540386.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 66210769 + 2093809 = 8137^2 + 1447^2 .

It is not an unprimeable number, because it can be changed into a prime (68304571) by changing a digit.

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 as a sum of consecutive naturals, namely, 17076143 + ... + 17076146.

Almost surely, 2^68304578 is an apocalyptic number.

68304578 is a deficient number, since it is larger than the sum of its proper divisors (34152292).

68304578 is a wasteful number, since it uses less digits than its factorization.

68304578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34152291.

The product of its (nonzero) digits is 161280, while the sum is 41.

The square root of 68304578 is about 8264.6583716449. The cubic root of 68304578 is about 408.7740057039.

The spelling of 68304578 in words is "sixty-eight million, three hundred four thousand, five hundred seventy-eight".