38857869 has 24 divisors (see below), whose sum is σ = 62562240. Its totient is φ = 23096448.

The previous prime is 38857843. The next prime is 38857891. The reversal of 38857869 is 96875883.

It is a happy number.

38857869 is a `hidden beast` number, since 3 + 8 + 8 + 578 + 69 = 666.

It is not a de Polignac number, because 38857869 - 2¹³ = 38849677 is a prime.

It is a super-2 number, since 2×38857869² = 3019867966442322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38857069) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3777 + ... + 9590.

It is an arithmetic number, because the mean of its divisors is an integer number (2606760).

Almost surely, 2^38857869 is an apocalyptic number.

It is an amenable number.

38857869 is a deficient number, since it is larger than the sum of its proper divisors (23704371).

38857869 is a wasteful number, since it uses less digits than its factorization.

38857869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13409 (or 13406 counting only the distinct ones).

The product of its digits is 2903040, while the sum is 54.

The square root of 38857869 is about 6233.6080242505. The cubic root of 38857869 is about 338.7086802086.

It can be divided in two parts, 38857 and 869, that multiplied together give a palindrome (33766733).

The spelling of 38857869 in words is "thirty-eight million, eight hundred fifty-seven thousand, eight hundred sixty-nine".