68690456 has 8 divisors (see below), whose sum is σ = 128794620. Its totient is φ = 34345224.

The previous prime is 68690449. The next prime is 68690471. The reversal of 68690456 is 65409686.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4293146 + ... + 4293161.

Almost surely, 2^68690456 is an apocalyptic number.

It is an amenable number.

68690456 is a deficient number, since it is larger than the sum of its proper divisors (60104164).

68690456 is a wasteful number, since it uses less digits than its factorization.

68690456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8586313 (or 8586309 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 44.

The square root of 68690456 is about 8287.9705597933. The cubic root of 68690456 is about 409.5423328595.

The spelling of 68690456 in words is "sixty-eight million, six hundred ninety thousand, four hundred fifty-six".