840878268 has 24 divisors (see below), whose sum is σ = 1962694272. Its totient is φ = 280200624.

The previous prime is 840878267. The next prime is 840878309. The reversal of 840878268 is 862878048.

840878268 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 840878268.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (840878261) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33571 + ... + 52997.

It is an arithmetic number, because the mean of its divisors is an integer number (81778928).

Almost surely, 2^840878268 is an apocalyptic number.

It is an amenable number.

840878268 is an abundant number, since it is smaller than the sum of its proper divisors (1121816004).

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

840878268 is a wasteful number, since it uses less digits than its factorization.

840878268 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23041 (or 23039 counting only the distinct ones).

The product of its (nonzero) digits is 1376256, while the sum is 51.

The square root of 840878268 is about 28997.9010964587. The cubic root of 840878268 is about 943.8675227650.

The spelling of 840878268 in words is "eight hundred forty million, eight hundred seventy-eight thousand, two hundred sixty-eight".