385639884 has 144 divisors (see below), whose sum is σ = 1181107200. Its totient is φ = 103638528.

The previous prime is 385639853. The next prime is 385639889. The reversal of 385639884 is 488936583.

It is a happy number.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 385639884.

It is not an unprimeable number, because it can be changed into a prime (385639889) 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 47 ways as a sum of consecutive naturals, for example, 1144164 + ... + 1144500.

Almost surely, 2^385639884 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 385639884, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (590553600).

385639884 is an abundant number, since it is smaller than the sum of its proper divisors (795467316).

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

385639884 is a wasteful number, since it uses less digits than its factorization.

385639884 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 612 (or 607 counting only the distinct ones).

The product of its digits is 4976640, while the sum is 54.

The square root of 385639884 is about 19637.7158549562. The cubic root of 385639884 is about 727.8814437821.

It can be divided in two parts, 3 and 85639884, that multiplied together give a palindrome (256919652).

The spelling of 385639884 in words is "three hundred eighty-five million, six hundred thirty-nine thousand, eight hundred eighty-four".