68689844 has 12 divisors (see below), whose sum is σ = 121558500. Its totient is φ = 33958848.

The previous prime is 68689813. The next prime is 68689847. The reversal of 68689844 is 44898686.

It can be written as a sum of positive squares in 2 ways, for example, as 28494244 + 40195600 = 5338^2 + 6340^2 .

It is a hoax number, since the sum of its digits (53) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68689847) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 96119 + ... + 96830.

It is an arithmetic number, because the mean of its divisors is an integer number (10129875).

Almost surely, 2^68689844 is an apocalyptic number.

It is an amenable number.

68689844 is a deficient number, since it is larger than the sum of its proper divisors (52868656).

68689844 is a wasteful number, since it uses less digits than its factorization.

68689844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193042 (or 193040 counting only the distinct ones).

The product of its digits is 2654208, while the sum is 53.

The square root of 68689844 is about 8287.9336387305. The cubic root of 68689844 is about 409.5411165787.

The spelling of 68689844 in words is "sixty-eight million, six hundred eighty-nine thousand, eight hundred forty-four".