840880712 has 32 divisors (see below), whose sum is σ = 1803518400. Its totient is φ = 360051264.

The previous prime is 840880709. The next prime is 840880717. The reversal of 840880712 is 217088048.

It is a happy number.

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (840880717) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 61739 + ... + 74117.

It is an arithmetic number, because the mean of its divisors is an integer number (56359950).

Almost surely, 2^840880712 is an apocalyptic number.

It is an amenable number.

840880712 is an abundant number, since it is smaller than the sum of its proper divisors (962637688).

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

840880712 is a wasteful number, since it uses less digits than its factorization.

840880712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13605 (or 13601 counting only the distinct ones).

The product of its (nonzero) digits is 28672, while the sum is 38.

The square root of 840880712 is about 28997.9432374091. The cubic root of 840880712 is about 943.8684372097.

The spelling of 840880712 in words is "eight hundred forty million, eight hundred eighty thousand, seven hundred twelve".