38308991 has 8 divisors (see below), whose sum is σ = 43835520. Its totient is φ = 32795928.

The previous prime is 38308981. The next prime is 38308993. The reversal of 38308991 is 19980383.

38308991 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 38308991 - 2⁶ = 38308927 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38308993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3740 + ... + 9518.

It is an arithmetic number, because the mean of its divisors is an integer number (5479440).

Almost surely, 2^38308991 is an apocalyptic number.

38308991 is a deficient number, since it is larger than the sum of its proper divisors (5526529).

38308991 is an equidigital number, since it uses as much as digits as its factorization.

38308991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6733.

The product of its (nonzero) digits is 46656, while the sum is 41.

The square root of 38308991 is about 6189.4257407291. The cubic root of 38308991 is about 337.1063276330.

It can be divided in two parts, 3830 and 8991, that added together give a palindrome (12821).

The spelling of 38308991 in words is "thirty-eight million, three hundred eight thousand, nine hundred ninety-one".