840918652 has 24 divisors (see below), whose sum is σ = 1687796096. Its totient is φ = 359116848.

The previous prime is 840918629. The next prime is 840918703. The reversal of 840918652 is 256819048.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 840918599 and 840918608.

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, 45138 + ... + 60985.

Almost surely, 2^840918652 is an apocalyptic number.

It is an amenable number.

840918652 is an abundant number, since it is smaller than the sum of its proper divisors (846877444).

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

840918652 is a wasteful number, since it uses less digits than its factorization.

840918652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106417 (or 106415 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 43.

The square root of 840918652 is about 28998.5974143578. The cubic root of 840918652 is about 943.8826325763.

The spelling of 840918652 in words is "eight hundred forty million, nine hundred eighteen thousand, six hundred fifty-two".