819247842 has 48 divisors (see below), whose sum is σ = 2057208192. Its totient is φ = 230771520.

The previous prime is 819247831. The next prime is 819247903. The reversal of 819247842 is 248742918.

819247842 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 36843 + ... + 54734.

It is an arithmetic number, because the mean of its divisors is an integer number (42858504).

Almost surely, 2^819247842 is an apocalyptic number.

819247842 is an abundant number, since it is smaller than the sum of its proper divisors (1237960350).

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

819247842 is a wasteful number, since it uses less digits than its factorization.

819247842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91663 (or 91660 counting only the distinct ones).

The product of its digits is 258048, while the sum is 45.

The square root of 819247842 is about 28622.5058651405. The cubic root of 819247842 is about 935.7038908288.

The spelling of 819247842 in words is "eight hundred nineteen million, two hundred forty-seven thousand, eight hundred forty-two".