855108738 has 144 divisors (see below), whose sum is σ = 2242435104. Its totient is φ = 241367040.

The previous prime is 855108713. The next prime is 855108757. The reversal of 855108738 is 837801558.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 855108693 and 855108702.

It is a congruent number.

It is an unprimeable number.

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 71 ways as a sum of consecutive naturals, for example, 8815506 + ... + 8815602.

It is an arithmetic number, because the mean of its divisors is an integer number (15572466).

Almost surely, 2^855108738 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 855108738, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1121217552).

855108738 is an abundant number, since it is smaller than the sum of its proper divisors (1387326366).

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

855108738 is a wasteful number, since it uses less digits than its factorization.

855108738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 239 (or 130 counting only the distinct ones).

The product of its (nonzero) digits is 268800, while the sum is 45.

The square root of 855108738 is about 29242.2423558796. The cubic root of 855108738 is about 949.1622302094.

The spelling of 855108738 in words is "eight hundred fifty-five million, one hundred eight thousand, seven hundred thirty-eight".