68589520 has 20 divisors (see below), whose sum is σ = 159470820. Its totient is φ = 27435776.

The previous prime is 68589491. The next prime is 68589523. The reversal of 68589520 is 2598586.

It can be written as a sum of positive squares in 2 ways, for example, as 22240656 + 46348864 = 4716^2 + 6808^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68589523) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 428605 + ... + 428764.

It is an arithmetic number, because the mean of its divisors is an integer number (7973541).

Almost surely, 2^68589520 is an apocalyptic number.

It is an amenable number.

68589520 is an abundant number, since it is smaller than the sum of its proper divisors (90881300).

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

68589520 is a wasteful number, since it uses less digits than its factorization.

68589520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 857382 (or 857376 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 43.

The square root of 68589520 is about 8281.8790138470. The cubic root of 68589520 is about 409.3416362297.

The spelling of 68589520 in words is "sixty-eight million, five hundred eighty-nine thousand, five hundred twenty".