38638207 has 2 divisors, whose sum is σ = 38638208. Its totient is φ = 38638206.

The previous prime is 38638181. The next prime is 38638213. The reversal of 38638207 is 70283683.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 38638207 - 2⁷ = 38638079 is a prime.

It is a super-2 number, since 2×38638207² = 2985822080349698, which contains 22 as substring.

It is a zygodrome in base 8.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38638217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19319103 + 19319104.

It is an arithmetic number, because the mean of its divisors is an integer number (19319104).

Almost surely, 2^38638207 is an apocalyptic number.

38638207 is a deficient number, since it is larger than the sum of its proper divisors (1).

38638207 is an equidigital number, since it uses as much as digits as its factorization.

38638207 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48384, while the sum is 37.

The square root of 38638207 is about 6215.9638834215. The cubic root of 38638207 is about 338.0692381763.

The spelling of 38638207 in words is "thirty-eight million, six hundred thirty-eight thousand, two hundred seven".