68728552 has 16 divisors (see below), whose sum is σ = 136446660. Its totient is φ = 32342784.

The previous prime is 68728549. The next prime is 68728571. The reversal of 68728552 is 25582786.

It can be written as a sum of positive squares in 2 ways, for example, as 68657796 + 70756 = 8286^2 + 266^2 .

It is a super-2 number, since 2×68728552² = 9447227720033408, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 68728499 and 68728508.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 252543 + ... + 252814.

Almost surely, 2^68728552 is an apocalyptic number.

It is an amenable number.

68728552 is a deficient number, since it is larger than the sum of its proper divisors (67718108).

68728552 is a wasteful number, since it uses less digits than its factorization.

68728552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 505380 (or 505376 counting only the distinct ones).

The product of its digits is 268800, while the sum is 43.

The square root of 68728552 is about 8290.2685119361. The cubic root of 68728552 is about 409.6180301359.

The spelling of 68728552 in words is "sixty-eight million, seven hundred twenty-eight thousand, five hundred fifty-two".