384768857 has 4 divisors (see below), whose sum is σ = 419747856. Its totient is φ = 349789860.

The previous prime is 384768851. The next prime is 384768899. The reversal of 384768857 is 758867483.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 384768857 - 2⁶ = 384768793 is a prime.

It is not an unprimeable number, because it can be changed into a prime (384768851) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17489483 + ... + 17489504.

It is an arithmetic number, because the mean of its divisors is an integer number (104936964).

Almost surely, 2^384768857 is an apocalyptic number.

It is an amenable number.

384768857 is a deficient number, since it is larger than the sum of its proper divisors (34978999).

384768857 is a wasteful number, since it uses less digits than its factorization.

384768857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34978998.

The product of its digits is 9031680, while the sum is 56.

The square root of 384768857 is about 19615.5259169873. The cubic root of 384768857 is about 727.3330199385. Note that the first 3 decimals are identical.

The spelling of 384768857 in words is "three hundred eighty-four million, seven hundred sixty-eight thousand, eight hundred fifty-seven".