68540706 has 24 divisors (see below), whose sum is σ = 159928860. Its totient is φ = 21089376.

The previous prime is 68540701. The next prime is 68540707. The reversal of 68540706 is 60704586.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 56115081 + 12425625 = 7491^2 + 3525^2 .

It is not an unprimeable number, because it can be changed into a prime (68540701) 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 11 ways as a sum of consecutive naturals, for example, 146221 + ... + 146688.

Almost surely, 2^68540706 is an apocalyptic number.

68540706 is an abundant number, since it is smaller than the sum of its proper divisors (91388154).

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

68540706 is a wasteful number, since it uses less digits than its factorization.

68540706 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 292930 (or 292927 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 36.

The square root of 68540706 is about 8278.9314527903. The cubic root of 68540706 is about 409.2445060136.

The spelling of 68540706 in words is "sixty-eight million, five hundred forty thousand, seven hundred six".