38128507 has 2 divisors, whose sum is σ = 38128508. Its totient is φ = 38128506.

The previous prime is 38128499. The next prime is 38128523. The reversal of 38128507 is 70582183.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 38128507 - 2³ = 38128499 is a prime.

It is not a weakly prime, because it can be changed into another prime (38120507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19064253 + 19064254.

It is an arithmetic number, because the mean of its divisors is an integer number (19064254).

Almost surely, 2^38128507 is an apocalyptic number.

38128507 is a deficient number, since it is larger than the sum of its proper divisors (1).

38128507 is an equidigital number, since it uses as much as digits as its factorization.

38128507 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13440, while the sum is 34.

The square root of 38128507 is about 6174.8284996427. The cubic root of 38128507 is about 336.5760944260.

The spelling of 38128507 in words is "thirty-eight million, one hundred twenty-eight thousand, five hundred seven".