68891224 has 8 divisors (see below), whose sum is σ = 129171060. Its totient is φ = 34445608.

The previous prime is 68891113. The next prime is 68891227. The reversal of 68891224 is 42219886.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68891227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is an upside-down number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4305694 + ... + 4305709.

Almost surely, 2^68891224 is an apocalyptic number.

It is an amenable number.

68891224 is a deficient number, since it is larger than the sum of its proper divisors (60279836).

68891224 is a wasteful number, since it uses less digits than its factorization.

68891224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8611409 (or 8611405 counting only the distinct ones).

The product of its digits is 55296, while the sum is 40.

The square root of 68891224 is about 8300.0737346122. The cubic root of 68891224 is about 409.9409472753.

The spelling of 68891224 in words is "sixty-eight million, eight hundred ninety-one thousand, two hundred twenty-four".