840235015242 has 96 divisors (see below), whose sum is σ = 2139407517312. Its totient is φ = 233295334272.

The previous prime is 840235015223. The next prime is 840235015307. The reversal of 840235015242 is 242510532048.

840235015242 is a `hidden beast` number, since 8 + 40 + 23 + 501 + 52 + 42 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 840235015197 and 840235015206.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3746508 + ... + 3964440.

It is an arithmetic number, because the mean of its divisors is an integer number (22285494972).

Almost surely, 2^840235015242 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 840235015242, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1069703758656).

840235015242 is an abundant number, since it is smaller than the sum of its proper divisors (1299172502070).

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

840235015242 is a wasteful number, since it uses less digits than its factorization.

840235015242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218812 (or 218809 counting only the distinct ones).

The product of its (nonzero) digits is 76800, while the sum is 36.

The spelling of 840235015242 in words is "eight hundred forty billion, two hundred thirty-five million, fifteen thousand, two hundred forty-two".