68478730 has 8 divisors (see below), whose sum is σ = 123261732. Its totient is φ = 27391488.

The previous prime is 68478713. The next prime is 68478731. The reversal of 68478730 is 3787486.

It can be written as a sum of positive squares in 2 ways, for example, as 58874929 + 9603801 = 7673^2 + 3099^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (68478731) 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 in 3 ways as a sum of consecutive naturals, for example, 3423927 + ... + 3423946.

Almost surely, 2^68478730 is an apocalyptic number.

68478730 is a deficient number, since it is larger than the sum of its proper divisors (54783002).

68478730 is a wasteful number, since it uses less digits than its factorization.

68478730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6847880.

The product of its (nonzero) digits is 225792, while the sum is 43.

The square root of 68478730 is about 8275.1876111663. The cubic root of 68478730 is about 409.1211195497.

The spelling of 68478730 in words is "sixty-eight million, four hundred seventy-eight thousand, seven hundred thirty".