38135857 has 4 divisors (see below), whose sum is σ = 38658340. Its totient is φ = 37613376.

The previous prime is 38135849. The next prime is 38135873. The reversal of 38135857 is 75853183.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 12895281 + 25240576 = 3591^2 + 5024^2 .

It is a cyclic number.

It is not a de Polignac number, because 38135857 - 2³ = 38135849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (38135827) 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, 261132 + ... + 261277.

It is an arithmetic number, because the mean of its divisors is an integer number (9664585).

Almost surely, 2^38135857 is an apocalyptic number.

It is an amenable number.

38135857 is a deficient number, since it is larger than the sum of its proper divisors (522483).

38135857 is an equidigital number, since it uses as much as digits as its factorization.

38135857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 522482.

The product of its digits is 100800, while the sum is 40.

The square root of 38135857 is about 6175.4236291934. The cubic root of 38135857 is about 336.5977201993.

The spelling of 38135857 in words is "thirty-eight million, one hundred thirty-five thousand, eight hundred fifty-seven".