68881538 has 8 divisors (see below), whose sum is σ = 112715280. Its totient is φ = 31309780.

The previous prime is 68881529. The next prime is 68881567. The reversal of 68881538 is 83518886.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 68881492 and 68881501.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1565468 + ... + 1565511.

It is an arithmetic number, because the mean of its divisors is an integer number (14089410).

Almost surely, 2^68881538 is an apocalyptic number.

68881538 is a deficient number, since it is larger than the sum of its proper divisors (43833742).

68881538 is a wasteful number, since it uses less digits than its factorization.

68881538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3130992.

The product of its digits is 368640, while the sum is 47.

The square root of 68881538 is about 8299.4902253090. The cubic root of 68881538 is about 409.9217340195.

The spelling of 68881538 in words is "sixty-eight million, eight hundred eighty-one thousand, five hundred thirty-eight".