840708872 has 8 divisors (see below), whose sum is σ = 1576329150. Its totient is φ = 420354432.

The previous prime is 840708859. The next prime is 840708887. The reversal of 840708872 is 278807048.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 548777476 + 291931396 = 23426^2 + 17086^2 .

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

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, 52544297 + ... + 52544312.

Almost surely, 2^840708872 is an apocalyptic number.

It is an amenable number.

840708872 is a deficient number, since it is larger than the sum of its proper divisors (735620278).

840708872 is a wasteful number, since it uses less digits than its factorization.

840708872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105088615 (or 105088611 counting only the distinct ones).

The product of its (nonzero) digits is 200704, while the sum is 44.

The square root of 840708872 is about 28994.9801172548. The cubic root of 840708872 is about 943.8041374029.

The spelling of 840708872 in words is "eight hundred forty million, seven hundred eight thousand, eight hundred seventy-two".