385171887 has 8 divisors (see below), whose sum is σ = 527442736. Its totient is φ = 249841152.

The previous prime is 385171879. The next prime is 385171901. The reversal of 385171887 is 788171583.

It is a happy number.

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

It is not a de Polignac number, because 385171887 - 2³ = 385171879 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 (385171867) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1734898 + ... + 1735119.

It is an arithmetic number, because the mean of its divisors is an integer number (65930342).

Almost surely, 2^385171887 is an apocalyptic number.

385171887 is a gapful number since it is divisible by the number (37) formed by its first and last digit.

385171887 is a deficient number, since it is larger than the sum of its proper divisors (142270849).

385171887 is a wasteful number, since it uses less digits than its factorization.

385171887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3470057.

The product of its digits is 376320, while the sum is 48.

The square root of 385171887 is about 19625.7964679144. The cubic root of 385171887 is about 727.5868820789.

It can be divided in two parts, 38517 and 1887, that added together give a palindrome (40404).

The spelling of 385171887 in words is "three hundred eighty-five million, one hundred seventy-one thousand, eight hundred eighty-seven".