840468472440 has 384 divisors, whose sum is σ = 2740070592000. Its totient is φ = 205661140992.

The previous prime is 840468472439. The next prime is 840468472483. The reversal of 840468472440 is 44274864048.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 914546301 + ... + 914547219.

It is an arithmetic number, because the mean of its divisors is an integer number (7135600500).

Almost surely, 2^840468472440 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 840468472440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1370035296000).

840468472440 is an abundant number, since it is smaller than the sum of its proper divisors (1899602119560).

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

840468472440 is a wasteful number, since it uses less digits than its factorization.

840468472440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1319 (or 1278 counting only the distinct ones).

The product of its (nonzero) digits is 5505024, while the sum is 51.

The spelling of 840468472440 in words is "eight hundred forty billion, four hundred sixty-eight million, four hundred seventy-two thousand, four hundred forty".