840364394 has 16 divisors (see below), whose sum is σ = 1290772032. Its totient is φ = 410120928.

The previous prime is 840364381. The next prime is 840364397. The reversal of 840364394 is 493463048.

840364394 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (840364397) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 168947 + ... + 173849.

It is an arithmetic number, because the mean of its divisors is an integer number (80673252).

Almost surely, 2^840364394 is an apocalyptic number.

840364394 is a deficient number, since it is larger than the sum of its proper divisors (450407638).

840364394 is a wasteful number, since it uses less digits than its factorization.

840364394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6941.

The product of its (nonzero) digits is 248832, while the sum is 41.

The square root of 840364394 is about 28989.0392044993. The cubic root of 840364394 is about 943.6752127980.

The spelling of 840364394 in words is "eight hundred forty million, three hundred sixty-four thousand, three hundred ninety-four".