840459612 has 12 divisors (see below), whose sum is σ = 1961072456. Its totient is φ = 280153200.

The previous prime is 840459611. The next prime is 840459649. The reversal of 840459612 is 216954048.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (840459611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35019139 + ... + 35019162.

Almost surely, 2^840459612 is an apocalyptic number.

It is an amenable number.

840459612 is an abundant number, since it is smaller than the sum of its proper divisors (1120612844).

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

840459612 is a wasteful number, since it uses less digits than its factorization.

840459612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70038308 (or 70038306 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 39.

The square root of 840459612 is about 28990.6814683615. The cubic root of 840459612 is about 943.7108526837.

The spelling of 840459612 in words is "eight hundred forty million, four hundred fifty-nine thousand, six hundred twelve".