840408484 has 6 divisors (see below), whose sum is σ = 1470714854. Its totient is φ = 420204240.

The previous prime is 840408473. The next prime is 840408493. The reversal of 840408484 is 484804048.

840408484 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 790846884 + 49561600 = 28122^2 + 7040^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105051057 + ... + 105051064.

Almost surely, 2^840408484 is an apocalyptic number.

It is an amenable number.

840408484 is a deficient number, since it is larger than the sum of its proper divisors (630306370).

840408484 is a wasteful number, since it uses less digits than its factorization.

840408484 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210102125 (or 210102123 counting only the distinct ones).

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

The square root of 840408484 is about 28989.7996543612. The cubic root of 840408484 is about 943.6917159216.

The spelling of 840408484 in words is "eight hundred forty million, four hundred eight thousand, four hundred eighty-four".