68628225 has 24 divisors (see below), whose sum is σ = 115885440. Its totient is φ = 35821120.

The previous prime is 68628221. The next prime is 68628227. The reversal of 68628225 is 52282686.

It is not a de Polignac number, because 68628225 - 2² = 68628221 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (68628221) 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 23 ways as a sum of consecutive naturals, for example, 6210 + ... + 13259.

It is an arithmetic number, because the mean of its divisors is an integer number (4828560).

Almost surely, 2^68628225 is an apocalyptic number.

It is an amenable number.

68628225 is a deficient number, since it is larger than the sum of its proper divisors (47257215).

68628225 is a wasteful number, since it uses less digits than its factorization.

68628225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19529 (or 19524 counting only the distinct ones).

The product of its digits is 92160, while the sum is 39.

The square root of 68628225 is about 8284.2154124576. The cubic root of 68628225 is about 409.4186187814.

The spelling of 68628225 in words is "sixty-eight million, six hundred twenty-eight thousand, two hundred twenty-five".