840384470 has 16 divisors (see below), whose sum is σ = 1515389040. Its totient is φ = 335554464.

The previous prime is 840384451. The next prime is 840384481. The reversal of 840384470 is 74483048.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69005 + ... + 80264.

It is an arithmetic number, because the mean of its divisors is an integer number (94711815).

Almost surely, 2^840384470 is an apocalyptic number.

840384470 is a deficient number, since it is larger than the sum of its proper divisors (675004570).

840384470 is a wasteful number, since it uses less digits than its factorization.

840384470 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149839.

The product of its (nonzero) digits is 86016, while the sum is 38.

The square root of 840384470 is about 28989.3854712376. The cubic root of 840384470 is about 943.6827274241.

The spelling of 840384470 in words is "eight hundred forty million, three hundred eighty-four thousand, four hundred seventy".