38857681 has 8 divisors (see below), whose sum is σ = 40309280. Its totient is φ = 37431072.

The previous prime is 38857607. The next prime is 38857691. The reversal of 38857681 is 18675883.

38857681 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 38857681 - 2¹⁵ = 38824913 is a prime.

It is a super-2 number, since 2×38857681² = 3019838745395522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (38857691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3051 + ... + 9328.

It is an arithmetic number, because the mean of its divisors is an integer number (5038660).

Almost surely, 2^38857681 is an apocalyptic number.

It is an amenable number.

38857681 is a deficient number, since it is larger than the sum of its proper divisors (1451599).

38857681 is a wasteful number, since it uses less digits than its factorization.

38857681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12495.

The product of its digits is 322560, while the sum is 46.

The square root of 38857681 is about 6233.5929446829. The cubic root of 38857681 is about 338.7081339672.

The spelling of 38857681 in words is "thirty-eight million, eight hundred fifty-seven thousand, six hundred eighty-one".