38715857 has 2 divisors, whose sum is σ = 38715858. Its totient is φ = 38715856.

The previous prime is 38715763. The next prime is 38715889. The reversal of 38715857 is 75851783.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 33535681 + 5180176 = 5791^2 + 2276^2 .

It is a cyclic number.

It is not a de Polignac number, because 38715857 - 2¹⁰ = 38714833 is a prime.

It is not a weakly prime, because it can be changed into another prime (38715557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19357928 + 19357929.

It is an arithmetic number, because the mean of its divisors is an integer number (19357929).

Almost surely, 2^38715857 is an apocalyptic number.

It is an amenable number.

38715857 is a deficient number, since it is larger than the sum of its proper divisors (1).

38715857 is an equidigital number, since it uses as much as digits as its factorization.

38715857 is an evil number, because the sum of its binary digits is even.

The product of its digits is 235200, while the sum is 44.

The square root of 38715857 is about 6222.2067628776. The cubic root of 38715857 is about 338.2955557055.

The spelling of 38715857 in words is "thirty-eight million, seven hundred fifteen thousand, eight hundred fifty-seven".