38668511 has 4 divisors (see below), whose sum is σ = 44192592. Its totient is φ = 33144432.

The previous prime is 38668507. The next prime is 38668547. The reversal of 38668511 is 11586683.

It is a happy number.

38668511 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11586683 = 151 ⋅76733.

It is a cyclic number.

It is not a de Polignac number, because 38668511 - 2² = 38668507 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 (38665511) 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 3 ways as a sum of consecutive naturals, for example, 2762030 + ... + 2762043.

It is an arithmetic number, because the mean of its divisors is an integer number (11048148).

Almost surely, 2^38668511 is an apocalyptic number.

38668511 is a deficient number, since it is larger than the sum of its proper divisors (5524081).

38668511 is an equidigital number, since it uses as much as digits as its factorization.

38668511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5524080.

The product of its digits is 34560, while the sum is 38.

The square root of 38668511 is about 6218.4010002572. The cubic root of 38668511 is about 338.1575978062.

The spelling of 38668511 in words is "thirty-eight million, six hundred sixty-eight thousand, five hundred eleven".