840138062242 has 8 divisors (see below), whose sum is σ = 1260211016016. Its totient is φ = 420067723572.

The previous prime is 840138062191. The next prime is 840138062263. The reversal of 840138062242 is 242260831048.

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

It is a junction number, because it is equal to n+sod(n) for n = 840138062195 and 840138062204.

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, 766293 + ... + 1505815.

It is an arithmetic number, because the mean of its divisors is an integer number (157526377002).

Almost surely, 2^840138062242 is an apocalyptic number.

840138062242 is a deficient number, since it is larger than the sum of its proper divisors (420072953774).

840138062242 is a wasteful number, since it uses less digits than its factorization.

840138062242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1307552.

The product of its (nonzero) digits is 147456, while the sum is 40.

The spelling of 840138062242 in words is "eight hundred forty billion, one hundred thirty-eight million, sixty-two thousand, two hundred forty-two".