67981338 has 24 divisors (see below), whose sum is σ = 148648500. Its totient is φ = 22451904.

The previous prime is 67981337. The next prime is 67981343. The reversal of 67981338 is 83318976.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 67617729 + 363609 = 8223^2 + 603^2 .

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 67981293 and 67981302.

It is not an unprimeable number, because it can be changed into a prime (67981337) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15363 + ... + 19286.

Almost surely, 2^67981338 is an apocalyptic number.

67981338 is an abundant number, since it is smaller than the sum of its proper divisors (80667162).

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

67981338 is a wasteful number, since it uses less digits than its factorization.

67981338 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34766 (or 34763 counting only the distinct ones).

The product of its digits is 217728, while the sum is 45.

The square root of 67981338 is about 8245.0796236301. The cubic root of 67981338 is about 408.1281676345.

The spelling of 67981338 in words is "sixty-seven million, nine hundred eighty-one thousand, three hundred thirty-eight".