68306445 has 12 divisors (see below), whose sum is σ = 118397916. Its totient is φ = 36430080.

The previous prime is 68306431. The next prime is 68306467. The reversal of 68306445 is 54460386.

68306445 is a `hidden beast` number, since 6 + 8 + 3 + 0 + 644 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 8538084 + 59768361 = 2922^2 + 7731^2 .

It is not a de Polignac number, because 68306445 - 2⁴ = 68306429 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 758916 + ... + 759005.

It is an arithmetic number, because the mean of its divisors is an integer number (9866493).

Almost surely, 2^68306445 is an apocalyptic number.

It is an amenable number.

68306445 is a deficient number, since it is larger than the sum of its proper divisors (50091471).

68306445 is a wasteful number, since it uses less digits than its factorization.

68306445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1517932 (or 1517929 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 36.

The square root of 68306445 is about 8264.7713217003. The cubic root of 68306445 is about 408.7777300717. Note that the first 4 decimals are identical.

The spelling of 68306445 in words is "sixty-eight million, three hundred six thousand, four hundred forty-five".