846391640 has 16 divisors (see below), whose sum is σ = 1904381280. Its totient is φ = 338556640.

The previous prime is 846391633. The next prime is 846391673. The reversal of 846391640 is 46193648.

846391640 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10579856 + ... + 10579935.

It is an arithmetic number, because the mean of its divisors is an integer number (119023830).

Almost surely, 2^846391640 is an apocalyptic number.

It is an amenable number.

846391640 is an abundant number, since it is smaller than the sum of its proper divisors (1057989640).

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

846391640 is a wasteful number, since it uses less digits than its factorization.

846391640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21159802 (or 21159798 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 41.

The square root of 846391640 is about 29092.8107957963. The cubic root of 846391640 is about 945.9259105219.

The spelling of 846391640 in words is "eight hundred forty-six million, three hundred ninety-one thousand, six hundred forty".