68736520 has 32 divisors (see below), whose sum is σ = 156841920. Its totient is φ = 27106240.

The previous prime is 68736511. The next prime is 68736523. The reversal of 68736520 is 2563786.

It is a self number, because there is not a number n which added to its sum of digits gives 68736520.

It is not an unprimeable number, because it can be changed into a prime (68736523) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9262 + ... + 14941.

It is an arithmetic number, because the mean of its divisors is an integer number (4901310).

Almost surely, 2^68736520 is an apocalyptic number.

It is an amenable number.

68736520 is an abundant number, since it is smaller than the sum of its proper divisors (88105400).

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

68736520 is a wasteful number, since it uses less digits than its factorization.

68736520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24285 (or 24281 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 37.

The square root of 68736520 is about 8290.7490614540. The cubic root of 68736520 is about 409.6338591242.

The spelling of 68736520 in words is "sixty-eight million, seven hundred thirty-six thousand, five hundred twenty".