840044084440 has 64 divisors (see below), whose sum is σ = 2063505404160. Its totient is φ = 305236648320.

The previous prime is 840044084423. The next prime is 840044084461. The reversal of 840044084440 is 44480440048.

It is a super-2 number, since 2×840044084440² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 840044084393 and 840044084402.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 155292 + ... + 1305451.

It is an arithmetic number, because the mean of its divisors is an integer number (32242271940).

Almost surely, 2^840044084440 is an apocalyptic number.

It is an amenable number.

840044084440 is an abundant number, since it is smaller than the sum of its proper divisors (1223461319720).

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

840044084440 is a wasteful number, since it uses less digits than its factorization.

840044084440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1462072 (or 1462068 counting only the distinct ones).

The product of its (nonzero) digits is 262144, while the sum is 40.

The spelling of 840044084440 in words is "eight hundred forty billion, forty-four million, eighty-four thousand, four hundred forty".