840138416 has 20 divisors (see below), whose sum is σ = 1752981552. Its totient is φ = 387756096.

The previous prime is 840138413. The next prime is 840138433. The reversal of 840138416 is 614831048.

840138416 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (840138413) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2019356 + ... + 2019771.

Almost surely, 2^840138416 is an apocalyptic number.

It is an amenable number.

840138416 is an abundant number, since it is smaller than the sum of its proper divisors (912843136).

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

840138416 is a wasteful number, since it uses less digits than its factorization.

840138416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4039148 (or 4039142 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 35.

The square root of 840138416 is about 28985.1412968783. The cubic root of 840138416 is about 943.5906189574.

It can be divided in two parts, 84013 and 8416, that added together give a palindrome (92429).

The spelling of 840138416 in words is "eight hundred forty million, one hundred thirty-eight thousand, four hundred sixteen".