851355740 has 12 divisors (see below), whose sum is σ = 1787847096. Its totient is φ = 340542288.

The previous prime is 851355721. The next prime is 851355749. The reversal of 851355740 is 47553158.

It is a junction number, because it is equal to n+sod(n) for n = 851355694 and 851355703.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (851355749) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21283874 + ... + 21283913.

It is an arithmetic number, because the mean of its divisors is an integer number (148987258).

Almost surely, 2^851355740 is an apocalyptic number.

It is an amenable number.

851355740 is an abundant number, since it is smaller than the sum of its proper divisors (936491356).

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

851355740 is a wasteful number, since it uses less digits than its factorization.

851355740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42567796 (or 42567794 counting only the distinct ones).

The product of its (nonzero) digits is 84000, while the sum is 38.

The square root of 851355740 is about 29178.0009596271. Note that the first 3 decimals coincide. The cubic root of 851355740 is about 947.7715968944.

The spelling of 851355740 in words is "eight hundred fifty-one million, three hundred fifty-five thousand, seven hundred forty".