840485709 has 12 divisors (see below), whose sum is σ = 1387468576. Its totient is φ = 480277512.

The previous prime is 840485693. The next prime is 840485753. The reversal of 840485709 is 907584048.

It is not a de Polignac number, because 840485709 - 2⁴ = 840485693 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (840485509) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6670459 + ... + 6670584.

Almost surely, 2^840485709 is an apocalyptic number.

It is an amenable number.

840485709 is a deficient number, since it is larger than the sum of its proper divisors (546982867).

840485709 is a wasteful number, since it uses less digits than its factorization.

840485709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13341056 (or 13341053 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 45.

The square root of 840485709 is about 28991.1315577712. The cubic root of 840485709 is about 943.7206202628.

The spelling of 840485709 in words is "eight hundred forty million, four hundred eighty-five thousand, seven hundred nine".