385171836 has 24 divisors (see below), whose sum is σ = 1027125120. Its totient is φ = 110049072.

The previous prime is 385171729. The next prime is 385171841. The reversal of 385171836 is 638171583.

It is a super-2 number, since 2×385171836² = 296714686495221792, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2292606 + ... + 2292773.

It is an arithmetic number, because the mean of its divisors is an integer number (42796880).

Almost surely, 2^385171836 is an apocalyptic number.

It is an amenable number.

385171836 is an abundant number, since it is smaller than the sum of its proper divisors (641953284).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

385171836 is a wasteful number, since it uses less digits than its factorization.

385171836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4585393 (or 4585391 counting only the distinct ones).

The product of its digits is 120960, while the sum is 42.

The square root of 385171836 is about 19625.7951686040. The cubic root of 385171836 is about 727.5868499660.

The spelling of 385171836 in words is "three hundred eighty-five million, one hundred seventy-one thousand, eight hundred thirty-six".