38357681 has 4 divisors (see below), whose sum is σ = 38716272. Its totient is φ = 37999092.

The previous prime is 38357663. The next prime is 38357719. The reversal of 38357681 is 18675383.

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 38357681 - 2⁶ = 38357617 is a prime.

It is a super-2 number, since 2×38357681² = 2942623383395522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (38357651) 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, 179135 + ... + 179348.

It is an arithmetic number, because the mean of its divisors is an integer number (9679068).

Almost surely, 2^38357681 is an apocalyptic number.

It is an amenable number.

38357681 is a deficient number, since it is larger than the sum of its proper divisors (358591).

38357681 is a wasteful number, since it uses less digits than its factorization.

38357681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 358590.

The product of its digits is 120960, while the sum is 41.

The square root of 38357681 is about 6193.3578130123. The cubic root of 38357681 is about 337.2490857492.

The spelling of 38357681 in words is "thirty-eight million, three hundred fifty-seven thousand, six hundred eighty-one".