851608044 has 108 divisors (see below), whose sum is σ = 2636033400. Its totient is φ = 230501376.

The previous prime is 851608031. The next prime is 851608057. The reversal of 851608044 is 440806158.

851608044 is a `hidden beast` number, since 8 + 5 + 1 + 608 + 0 + 44 = 666.

It is an interprime number because it is at equal distance from previous prime (851608031) and next prime (851608057).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 20812 + ... + 46220.

Almost surely, 2^851608044 is an apocalyptic number.

851608044 is a gapful number since it is divisible by the number (84) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 851608044, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1318016700).

851608044 is an abundant number, since it is smaller than the sum of its proper divisors (1784425356).

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

851608044 is a wasteful number, since it uses less digits than its factorization.

851608044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25452 (or 25440 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 36.

The square root of 851608044 is about 29182.3241706345. The cubic root of 851608044 is about 947.8652134386.

The spelling of 851608044 in words is "eight hundred fifty-one million, six hundred eight thousand, forty-four".