840256752 has 40 divisors (see below), whose sum is σ = 2172896640. Its totient is φ = 279797440.

The previous prime is 840256751. The next prime is 840256771. The reversal of 840256752 is 257652048.

It is a self number, because there is not a number n which added to its sum of digits gives 840256752.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (840256751) 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, 40999 + ... + 57977.

It is an arithmetic number, because the mean of its divisors is an integer number (54322416).

Almost surely, 2^840256752 is an apocalyptic number.

It is an amenable number.

840256752 is an abundant number, since it is smaller than the sum of its proper divisors (1332639888).

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

840256752 is a wasteful number, since it uses less digits than its factorization.

840256752 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18021 (or 18015 counting only the distinct ones).

The product of its (nonzero) digits is 134400, while the sum is 39.

The square root of 840256752 is about 28987.1825467740. The cubic root of 840256752 is about 943.6349193946.

The spelling of 840256752 in words is "eight hundred forty million, two hundred fifty-six thousand, seven hundred fifty-two".