840861022 has 4 divisors (see below), whose sum is σ = 1261291536. Its totient is φ = 420430510.

The previous prime is 840861013. The next prime is 840861037. The reversal of 840861022 is 220168048.

840861022 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210215254 + ... + 210215257.

It is an arithmetic number, because the mean of its divisors is an integer number (315322884).

Almost surely, 2^840861022 is an apocalyptic number.

840861022 is a deficient number, since it is larger than the sum of its proper divisors (420430514).

840861022 is a wasteful number, since it uses less digits than its factorization.

840861022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 420430513.

The product of its (nonzero) digits is 6144, while the sum is 31.

The square root of 840861022 is about 28997.6037285842. The cubic root of 840861022 is about 943.8610699679.

The spelling of 840861022 in words is "eight hundred forty million, eight hundred sixty-one thousand, twenty-two".