840004144042 has 32 divisors (see below), whose sum is σ = 1474995658752. Its totient is φ = 351271683504.

The previous prime is 840004144019. The next prime is 840004144051. The reversal of 840004144042 is 240441400048.

It is a junction number, because it is equal to n+sod(n) for n = 840004143995 and 840004144013.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 117978 + ... + 1301509.

It is an arithmetic number, because the mean of its divisors is an integer number (46093614336).

Almost surely, 2^840004144042 is an apocalyptic number.

840004144042 is a deficient number, since it is larger than the sum of its proper divisors (634991514710).

840004144042 is a wasteful number, since it uses less digits than its factorization.

840004144042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1420522.

The product of its (nonzero) digits is 16384, while the sum is 31.

The spelling of 840004144042 in words is "eight hundred forty billion, four million, one hundred forty-four thousand, forty-two".