38685561 has 8 divisors (see below), whose sum is σ = 51795744. Its totient is φ = 25682880.

The previous prime is 38685503. The next prime is 38685587. The reversal of 38685561 is 16558683.

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

It is not a de Polignac number, because 38685561 - 2⁶ = 38685497 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (38685161) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26031 + ... + 27476.

It is an arithmetic number, because the mean of its divisors is an integer number (6474468).

Almost surely, 2^38685561 is an apocalyptic number.

It is an amenable number.

38685561 is a deficient number, since it is larger than the sum of its proper divisors (13110183).

38685561 is a wasteful number, since it uses less digits than its factorization.

38685561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53751.

The product of its digits is 172800, while the sum is 42.

The square root of 38685561 is about 6219.7717803791. The cubic root of 38685561 is about 338.2072914690.

The spelling of 38685561 in words is "thirty-eight million, six hundred eighty-five thousand, five hundred sixty-one".