38635661 has 8 divisors (see below), whose sum is σ = 39244800. Its totient is φ = 38029680.

The previous prime is 38635637. The next prime is 38635673. The reversal of 38635661 is 16653683.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-38635661 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 (38635601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37331 + ... + 38351.

It is an arithmetic number, because the mean of its divisors is an integer number (4905600).

Almost surely, 2^38635661 is an apocalyptic number.

It is an amenable number.

38635661 is a deficient number, since it is larger than the sum of its proper divisors (609139).

38635661 is a wasteful number, since it uses less digits than its factorization.

38635661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1579.

The product of its digits is 77760, while the sum is 38.

The square root of 38635661 is about 6215.7590847780. The cubic root of 38635661 is about 338.0618125109.

The spelling of 38635661 in words is "thirty-eight million, six hundred thirty-five thousand, six hundred sixty-one".