851342740 has 24 divisors (see below), whose sum is σ = 1788431400. Its totient is φ = 340420608.

The previous prime is 851342729. The next prime is 851342771. The reversal of 851342740 is 47243158.

It can be written as a sum of positive squares in 4 ways, for example, as 33039504 + 818303236 = 5748^2 + 28606^2 .

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 851342696 and 851342705.

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 7 ways as a sum of consecutive naturals, for example, 75724 + ... + 86236.

It is an arithmetic number, because the mean of its divisors is an integer number (74517975).

Almost surely, 2^851342740 is an apocalyptic number.

It is an amenable number.

851342740 is an abundant number, since it is smaller than the sum of its proper divisors (937088660).

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

851342740 is a wasteful number, since it uses less digits than its factorization.

851342740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14571 (or 14569 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 34.

The square root of 851342740 is about 29177.7781882034. The cubic root of 851342740 is about 947.7667727874.

Adding to 851342740 its reverse (47243158), we get a palindrome (898585898).

The spelling of 851342740 in words is "eight hundred fifty-one million, three hundred forty-two thousand, seven hundred forty".