840444088 has 32 divisors (see below), whose sum is σ = 1738422000. Its totient is φ = 377724160.

The previous prime is 840444067. The next prime is 840444091. The reversal of 840444088 is 880444048.

It is a self number, because there is not a number n which added to its sum of digits gives 840444088.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45823 + ... + 61486.

Almost surely, 2^840444088 is an apocalyptic number.

840444088 is a gapful number since it is divisible by the number (88) formed by its first and last digit.

It is an amenable number.

840444088 is an abundant number, since it is smaller than the sum of its proper divisors (897977912).

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

840444088 is a wasteful number, since it uses less digits than its factorization.

840444088 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107415 (or 107411 counting only the distinct ones).

The product of its (nonzero) digits is 131072, while the sum is 40.

The square root of 840444088 is about 28990.4137259198. The cubic root of 840444088 is about 943.7050422687.

Subtracting from 840444088 its sum of digits (40), we obtain a palindrome (840444048).

The spelling of 840444088 in words is "eight hundred forty million, four hundred forty-four thousand, eighty-eight".