68686250 has 20 divisors (see below), whose sum is σ = 128747850. Its totient is φ = 27474000.

The previous prime is 68686249. The next prime is 68686253. The reversal of 68686250 is 5268686.

It can be written as a sum of positive squares in 5 ways, for example, as 11881 + 68674369 = 109^2 + 8287^2 .

It is a junction number, because it is equal to n+sod(n) for n = 68686198 and 68686207.

It is not an unprimeable number, because it can be changed into a prime (68686253) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 26225 + ... + 28724.

Almost surely, 2^68686250 is an apocalyptic number.

68686250 is a deficient number, since it is larger than the sum of its proper divisors (60061600).

68686250 is an equidigital number, since it uses as much as digits as its factorization.

68686250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54971 (or 54956 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 41.

The square root of 68686250 is about 8287.7168146601. The cubic root of 68686250 is about 409.5339737641.

The spelling of 68686250 in words is "sixty-eight million, six hundred eighty-six thousand, two hundred fifty".