840440808088 has 32 divisors (see below), whose sum is σ = 1818429500160. Its totient is φ = 356691935520.

The previous prime is 840440808071. The next prime is 840440808091. The reversal of 840440808088 is 880808044048.

It is a happy number.

It is a super-2 number, since 2×840440808088² (a number of 25 digits) contains 22 as substring.

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, 72847978 + ... + 72859513.

It is an arithmetic number, because the mean of its divisors is an integer number (56825921880).

Almost surely, 2^840440808088 is an apocalyptic number.

It is an amenable number.

840440808088 is an abundant number, since it is smaller than the sum of its proper divisors (977988692072).

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

840440808088 is a wasteful number, since it uses less digits than its factorization.

840440808088 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145707607 (or 145707603 counting only the distinct ones).

The product of its (nonzero) digits is 2097152, while the sum is 52.

The spelling of 840440808088 in words is "eight hundred forty billion, four hundred forty million, eight hundred eight thousand, eighty-eight".