38687857 has 8 divisors (see below), whose sum is σ = 43856960. Its totient is φ = 33832080.

The previous prime is 38687851. The next prime is 38687867. The reversal of 38687857 is 75878683.

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 38687857 - 2⁷ = 38687729 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (38687851) 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, 78069 + ... + 78562.

It is an arithmetic number, because the mean of its divisors is an integer number (5482120).

Almost surely, 2^38687857 is an apocalyptic number.

It is an amenable number.

38687857 is a deficient number, since it is larger than the sum of its proper divisors (5169103).

38687857 is a wasteful number, since it uses less digits than its factorization.

38687857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156663.

The product of its digits is 2257920, while the sum is 52.

The square root of 38687857 is about 6219.9563503292. The cubic root of 38687857 is about 338.2139822391.

The spelling of 38687857 in words is "thirty-eight million, six hundred eighty-seven thousand, eight hundred fifty-seven".