840343412 has 12 divisors (see below), whose sum is σ = 1518039936. Its totient is φ = 406617720.

The previous prime is 840343397. The next prime is 840343417. The reversal of 840343412 is 214343048.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (840343417) 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, 3388358 + ... + 3388605.

It is an arithmetic number, because the mean of its divisors is an integer number (126503328).

Almost surely, 2^840343412 is an apocalyptic number.

It is an amenable number.

840343412 is a deficient number, since it is larger than the sum of its proper divisors (677696524).

840343412 is a wasteful number, since it uses less digits than its factorization.

840343412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6776998 (or 6776996 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 29.

The square root of 840343412 is about 28988.6773068383. The cubic root of 840343412 is about 943.6673589201.

It can be divided in two parts, 8403 and 43412, that added together give a palindrome (51815).

The spelling of 840343412 in words is "eight hundred forty million, three hundred forty-three thousand, four hundred twelve".