840310047 has 36 divisors (see below), whose sum is σ = 1264199560. Its totient is φ = 537736320.

The previous prime is 840310021. The next prime is 840310049. The reversal of 840310047 is 740013048.

840310047 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 840310047 - 2⁸ = 840309791 is a prime.

It is a super-2 number, since 2×840310047² = 1412241950178284418, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 840310047.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (840310049) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1013229 + ... + 1014057.

Almost surely, 2^840310047 is an apocalyptic number.

840310047 is a deficient number, since it is larger than the sum of its proper divisors (423889513).

840310047 is a wasteful number, since it uses less digits than its factorization.

840310047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 984 (or 940 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 840310047 is about 28988.1018178148. The cubic root of 840310047 is about 943.6548696299.

The spelling of 840310047 in words is "eight hundred forty million, three hundred ten thousand, forty-seven".