38658661 has 8 divisors (see below), whose sum is σ = 39312000. Its totient is φ = 38009952.

The previous prime is 38658619. The next prime is 38658691. The reversal of 38658661 is 16685683.

38658661 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 38658661 - 2⁷ = 38658533 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 (38658601) 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, 18340 + ... + 20338.

It is an arithmetic number, because the mean of its divisors is an integer number (4914000).

Almost surely, 2^38658661 is an apocalyptic number.

It is an amenable number.

38658661 is a deficient number, since it is larger than the sum of its proper divisors (653339).

38658661 is a wasteful number, since it uses less digits than its factorization.

38658661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2315.

The product of its digits is 207360, while the sum is 43.

The square root of 38658661 is about 6217.6089455674. The cubic root of 38658661 is about 338.1288824931.

The spelling of 38658661 in words is "thirty-eight million, six hundred fifty-eight thousand, six hundred sixty-one".