840884920 has 32 divisors (see below), whose sum is σ = 1953025920. Its totient is φ = 325503360.

The previous prime is 840884917. The next prime is 840884921. The reversal of 840884920 is 29488048.

840884920 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (43) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (840884921) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 337827 + ... + 340306.

It is an arithmetic number, because the mean of its divisors is an integer number (61032060).

Almost surely, 2^840884920 is an apocalyptic number.

It is an amenable number.

840884920 is an abundant number, since it is smaller than the sum of its proper divisors (1112141000).

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

840884920 is a wasteful number, since it uses less digits than its factorization.

840884920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 678175 (or 678171 counting only the distinct ones).

The product of its (nonzero) digits is 147456, while the sum is 43.

The square root of 840884920 is about 28998.0157941884. The cubic root of 840884920 is about 943.8700116668.

The spelling of 840884920 in words is "eight hundred forty million, eight hundred eighty-four thousand, nine hundred twenty".