840468738 has 8 divisors (see below), whose sum is σ = 1680937488. Its totient is φ = 280156244.

The previous prime is 840468721. The next prime is 840468751. The reversal of 840468738 is 837864048.

It is a sphenic number, since it is the product of 3 distinct primes.

840468738 is an admirable number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70039056 + ... + 70039067.

It is an arithmetic number, because the mean of its divisors is an integer number (210117186).

Almost surely, 2^840468738 is an apocalyptic number.

840468738 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

840468738 is a wasteful number, since it uses less digits than its factorization.

840468738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140078128.

The product of its (nonzero) digits is 1032192, while the sum is 48.

The square root of 840468738 is about 28990.8388633375. The cubic root of 840468738 is about 943.7142683839.

The spelling of 840468738 in words is "eight hundred forty million, four hundred sixty-eight thousand, seven hundred thirty-eight".