68690196 has 18 divisors (see below), whose sum is σ = 173633642. Its totient is φ = 22896720.

The previous prime is 68690179. The next prime is 68690197. The reversal of 68690196 is 69109686.

It can be written as a sum of positive squares in only one way, i.e., 68657796 + 32400 = 8286^2 + 180^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68690197) by changing a digit.

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 in 5 ways as a sum of consecutive naturals, for example, 953995 + ... + 954066.

Almost surely, 2^68690196 is an apocalyptic number.

It is an amenable number.

68690196 is an abundant number, since it is smaller than the sum of its proper divisors (104943446).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

68690196 is a wasteful number, since it uses less digits than its factorization.

68690196 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1908071 (or 1908066 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 45.

The square root of 68690196 is about 8287.9548743945. The cubic root of 68690196 is about 409.5418161397.

It can be divided in two parts, 68690 and 196, that added together give a palindrome (68886).

The spelling of 68690196 in words is "sixty-eight million, six hundred ninety thousand, one hundred ninety-six".