38387857 has 2 divisors, whose sum is σ = 38387858. Its totient is φ = 38387856.

The previous prime is 38387807. The next prime is 38387873. The reversal of 38387857 is 75878383.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 34857216 + 3530641 = 5904^2 + 1879^2 .

It is a cyclic number.

It is not a de Polignac number, because 38387857 - 2¹⁵ = 38355089 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 38387857.

It is not a weakly prime, because it can be changed into another prime (38387807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19193928 + 19193929.

It is an arithmetic number, because the mean of its divisors is an integer number (19193929).

Almost surely, 2^38387857 is an apocalyptic number.

It is an amenable number.

38387857 is a deficient number, since it is larger than the sum of its proper divisors (1).

38387857 is an equidigital number, since it uses as much as digits as its factorization.

38387857 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1128960, while the sum is 49.

The square root of 38387857 is about 6195.7934923624. The cubic root of 38387857 is about 337.3375005561.

The spelling of 38387857 in words is "thirty-eight million, three hundred eighty-seven thousand, eight hundred fifty-seven".