840003984 has 60 divisors (see below), whose sum is σ = 2474581200. Its totient is φ = 265263552.

The previous prime is 840003961. The next prime is 840004013. The reversal of 840003984 is 489300048.

It is a Harshad number since it is a multiple of its sum of digits (36).

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 11 ways as a sum of consecutive naturals, for example, 150774 + ... + 156245.

It is an arithmetic number, because the mean of its divisors is an integer number (41243020).

Almost surely, 2^840003984 is an apocalyptic number.

It is an amenable number.

840003984 is an abundant number, since it is smaller than the sum of its proper divisors (1634577216).

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

840003984 is a wasteful number, since it uses less digits than its factorization.

840003984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 307052 (or 307043 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The square root of 840003984 is about 28982.8222228271. The cubic root of 840003984 is about 943.5402877509.

The spelling of 840003984 in words is "eight hundred forty million, three thousand, nine hundred eighty-four".