68905730 has 16 divisors (see below), whose sum is σ = 124823160. Its totient is φ = 27386112.

The previous prime is 68905721. The next prime is 68905741. The reversal of 68905730 is 3750986.

It can be written as a sum of positive squares in 4 ways, for example, as 62995969 + 5909761 = 7937^2 + 2431^2 .

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, 20375 + ... + 23514.

Almost surely, 2^68905730 is an apocalyptic number.

68905730 is a deficient number, since it is larger than the sum of its proper divisors (55917430).

68905730 is a wasteful number, since it uses less digits than its factorization.

68905730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44053.

The product of its (nonzero) digits is 45360, while the sum is 38.

The square root of 68905730 is about 8300.9475362756. The cubic root of 68905730 is about 409.9697181680.

The spelling of 68905730 in words is "sixty-eight million, nine hundred five thousand, seven hundred thirty".