840550636 has 6 divisors (see below), whose sum is σ = 1470963620. Its totient is φ = 420275316.

The previous prime is 840550631. The next prime is 840550657. The reversal of 840550636 is 636055048.

It is a junction number, because it is equal to n+sod(n) for n = 840550595 and 840550604.

It is not an unprimeable number, because it can be changed into a prime (840550631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105068826 + ... + 105068833.

Almost surely, 2^840550636 is an apocalyptic number.

It is an amenable number.

840550636 is a deficient number, since it is larger than the sum of its proper divisors (630412984).

840550636 is a wasteful number, since it uses less digits than its factorization.

840550636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210137663 (or 210137661 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 37.

The square root of 840550636 is about 28992.2513096172. The cubic root of 840550636 is about 943.7449202481.

The spelling of 840550636 in words is "eight hundred forty million, five hundred fifty thousand, six hundred thirty-six".