68729544 has 96 divisors (see below), whose sum is σ = 202795320. Its totient is φ = 20901888.

The previous prime is 68729539. The next prime is 68729567. The reversal of 68729544 is 44592786.

It is a happy number.

68729544 is a `hidden beast` number, since 6 + 87 + 29 + 544 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 49702500 + 19027044 = 7050^2 + 4362^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 68729544.

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 23 ways as a sum of consecutive naturals, for example, 90414 + ... + 91170.

Almost surely, 2^68729544 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 68729544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (101397660).

68729544 is an abundant number, since it is smaller than the sum of its proper divisors (134065776).

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

68729544 is a wasteful number, since it uses less digits than its factorization.

68729544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 879 (or 872 counting only the distinct ones).

The product of its digits is 483840, while the sum is 45.

The square root of 68729544 is about 8290.3283409042. The cubic root of 68729544 is about 409.6200008798.

The spelling of 68729544 in words is "sixty-eight million, seven hundred twenty-nine thousand, five hundred forty-four".