38403971 has 4 divisors (see below), whose sum is σ = 38944944. Its totient is φ = 37863000.

The previous prime is 38403943. The next prime is 38403973. The reversal of 38403971 is 17930483.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 38403971 - 2⁶ = 38403907 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (38403973) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 270380 + ... + 270521.

It is an arithmetic number, because the mean of its divisors is an integer number (9736236).

Almost surely, 2^38403971 is an apocalyptic number.

38403971 is a deficient number, since it is larger than the sum of its proper divisors (540973).

38403971 is an equidigital number, since it uses as much as digits as its factorization.

38403971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 540972.

The product of its (nonzero) digits is 18144, while the sum is 35.

The square root of 38403971 is about 6197.0937543336. The cubic root of 38403971 is about 337.3846951334.

The spelling of 38403971 in words is "thirty-eight million, four hundred three thousand, nine hundred seventy-one".