68644786 has 24 divisors (see below), whose sum is σ = 120715056. Its totient is φ = 29189160.

The previous prime is 68644661. The next prime is 68644787. The reversal of 68644786 is 68744686.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is not an unprimeable number, because it can be changed into a prime (68644787) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10165 + ... + 15511.

It is an arithmetic number, because the mean of its divisors is an integer number (5029794).

Almost surely, 2^68644786 is an apocalyptic number.

68644786 is a deficient number, since it is larger than the sum of its proper divisors (52070270).

68644786 is a wasteful number, since it uses less digits than its factorization.

68644786 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5494 (or 5487 counting only the distinct ones).

The product of its digits is 1548288, while the sum is 49.

The square root of 68644786 is about 8285.2149036703. The cubic root of 68644786 is about 409.4515490440.

The spelling of 68644786 in words is "sixty-eight million, six hundred forty-four thousand, seven hundred eighty-six".