851148738 has 96 divisors (see below), whose sum is σ = 2152987200. Its totient is φ = 240278400.

The previous prime is 851148731. The next prime is 851148743. The reversal of 851148738 is 837841158.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 851148693 and 851148702.

It is not an unprimeable number, because it can be changed into a prime (851148731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 227628 + ... + 231336.

It is an arithmetic number, because the mean of its divisors is an integer number (22426950).

Almost surely, 2^851148738 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 851148738, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1076493600).

851148738 is an abundant number, since it is smaller than the sum of its proper divisors (1301838462).

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

851148738 is a wasteful number, since it uses less digits than its factorization.

851148738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3808 (or 3805 counting only the distinct ones).

The product of its digits is 215040, while the sum is 45.

The square root of 851148738 is about 29174.4535167328. The cubic root of 851148738 is about 947.6947756903.

The spelling of 851148738 in words is "eight hundred fifty-one million, one hundred forty-eight thousand, seven hundred thirty-eight".