38520857 has 2 divisors, whose sum is σ = 38520858. Its totient is φ = 38520856.

The previous prime is 38520851. The next prime is 38520887. The reversal of 38520857 is 75802583.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 36529936 + 1990921 = 6044^2 + 1411^2 .

It is a cyclic number.

It is not a de Polignac number, because 38520857 - 2⁴ = 38520841 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 38520857.

It is not a weakly prime, because it can be changed into another prime (38520851) 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 as a sum of consecutive naturals, namely, 19260428 + 19260429.

It is an arithmetic number, because the mean of its divisors is an integer number (19260429).

Almost surely, 2^38520857 is an apocalyptic number.

It is an amenable number.

38520857 is a deficient number, since it is larger than the sum of its proper divisors (1).

38520857 is an equidigital number, since it uses as much as digits as its factorization.

38520857 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 67200, while the sum is 38.

The square root of 38520857 is about 6206.5173003867. The cubic root of 38520857 is about 337.7266355231.

The spelling of 38520857 in words is "thirty-eight million, five hundred twenty thousand, eight hundred fifty-seven".