840063128 has 8 divisors (see below), whose sum is σ = 1575118380. Its totient is φ = 420031560.

The previous prime is 840063083. The next prime is 840063139. The reversal of 840063128 is 821360048.

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 840063094 and 840063103.

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 as a sum of consecutive naturals, namely, 52503938 + ... + 52503953.

Almost surely, 2^840063128 is an apocalyptic number.

It is an amenable number.

840063128 is a deficient number, since it is larger than the sum of its proper divisors (735055252).

840063128 is a wasteful number, since it uses less digits than its factorization.

840063128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105007897 (or 105007893 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 32.

The square root of 840063128 is about 28983.8425333840. The cubic root of 840063128 is about 943.5624318669.

The spelling of 840063128 in words is "eight hundred forty million, sixty-three thousand, one hundred twenty-eight".