68906385 has 12 divisors (see below), whose sum is σ = 119437812. Its totient is φ = 36750048.

The previous prime is 68906359. The next prime is 68906399. The reversal of 68906385 is 58360986.

68906385 is a `hidden beast` number, since 6 + 8 + 9 + 0 + 638 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 34999056 + 33907329 = 5916^2 + 5823^2 .

It is not a de Polignac number, because 68906385 - 2⁵ = 68906353 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 1531253 = 68906385 / (6 + 8 + 9 + 0 + 6 + 3 + 8 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 68906385.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 765582 + ... + 765671.

It is an arithmetic number, because the mean of its divisors is an integer number (9953151).

Almost surely, 2^68906385 is an apocalyptic number.

It is an amenable number.

68906385 is a deficient number, since it is larger than the sum of its proper divisors (50531427).

68906385 is a wasteful number, since it uses less digits than its factorization.

68906385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1531264 (or 1531261 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 45.

The square root of 68906385 is about 8300.9869895091. The cubic root of 68906385 is about 409.9710171858.

The spelling of 68906385 in words is "sixty-eight million, nine hundred six thousand, three hundred eighty-five".