68641992 has 40 divisors (see below), whose sum is σ = 192262950. Its totient is φ = 22880448.

The previous prime is 68641931. The next prime is 68641997. The reversal of 68641992 is 29914686.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 42693156 + 25948836 = 6534^2 + 5094^2 .

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (68641997) by changing a digit.

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

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 52317 + ... + 53612.

Almost surely, 2^68641992 is an apocalyptic number.

It is an amenable number.

68641992 is an abundant number, since it is smaller than the sum of its proper divisors (123620958).

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

68641992 is a wasteful number, since it uses less digits than its factorization.

68641992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105947 (or 105934 counting only the distinct ones).

The product of its digits is 186624, while the sum is 45.

The square root of 68641992 is about 8285.0462883438. The cubic root of 68641992 is about 409.4459937634.

The spelling of 68641992 in words is "sixty-eight million, six hundred forty-one thousand, nine hundred ninety-two".