38068781 has 4 divisors (see below), whose sum is σ = 38424672. Its totient is φ = 37712892.

The previous prime is 38068777. The next prime is 38068817. The reversal of 38068781 is 18786083.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 38068781 - 2² = 38068777 is a prime.

It is a super-2 number, since 2×38068781² = 2898464173651922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38068721) 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 3 ways as a sum of consecutive naturals, for example, 177785 + ... + 177998.

It is an arithmetic number, because the mean of its divisors is an integer number (9606168).

Almost surely, 2^38068781 is an apocalyptic number.

It is an amenable number.

38068781 is a deficient number, since it is larger than the sum of its proper divisors (355891).

38068781 is a wasteful number, since it uses less digits than its factorization.

38068781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 355890.

The product of its (nonzero) digits is 64512, while the sum is 41.

The square root of 38068781 is about 6169.9903565565. The cubic root of 38068781 is about 336.4002605516.

The spelling of 38068781 in words is "thirty-eight million, sixty-eight thousand, seven hundred eighty-one".