855544444 has 24 divisors (see below), whose sum is σ = 1536479280. Its totient is φ = 416667264.

The previous prime is 855544429. The next prime is 855544453. The reversal of 855544444 is 444445558.

It is a happy number.

It is a nialpdrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 855544444.

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, 14952 + ... + 43984.

It is an arithmetic number, because the mean of its divisors is an integer number (64019970).

Almost surely, 2^855544444 is an apocalyptic number.

It is an amenable number.

855544444 is a deficient number, since it is larger than the sum of its proper divisors (680934836).

855544444 is a wasteful number, since it uses less digits than its factorization.

855544444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29229 (or 29227 counting only the distinct ones).

The product of its digits is 1024000, while the sum is 43.

The square root of 855544444 is about 29249.6913487989. The cubic root of 855544444 is about 949.3234126182.

It can be divided in two parts, 85554 and 4444, that added together give a palindrome (89998).

The spelling of 855544444 in words is "eight hundred fifty-five million, five hundred forty-four thousand, four hundred forty-four".