840553500 has 192 divisors, whose sum is σ = 2542700160. Its totient is φ = 215654400.

The previous prime is 840553481. The next prime is 840553501. The reversal of 840553500 is 5355048.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (840553501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 7711446 + ... + 7711554.

It is an arithmetic number, because the mean of its divisors is an integer number (13243230).

Almost surely, 2^840553500 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 840553500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1271350080).

840553500 is an abundant number, since it is smaller than the sum of its proper divisors (1702146660).

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

840553500 is a wasteful number, since it uses less digits than its factorization.

840553500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 281 (or 269 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 30.

The square root of 840553500 is about 28992.3007020830. The cubic root of 840553500 is about 943.7459921178.

The spelling of 840553500 in words is "eight hundred forty million, five hundred fifty-three thousand, five hundred".