840440298794 has 16 divisors (see below), whose sum is σ = 1261661498496. Its totient is φ = 419886537600.

The previous prime is 840440298791. The next prime is 840440298809. The reversal of 840440298794 is 497892044048.

840440298794 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 (840440298791) 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, 40706714 + ... + 40727354.

It is an arithmetic number, because the mean of its divisors is an integer number (78853843656).

Almost surely, 2^840440298794 is an apocalyptic number.

840440298794 is a deficient number, since it is larger than the sum of its proper divisors (421221199702).

840440298794 is a wasteful number, since it uses less digits than its factorization.

840440298794 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35821.

The product of its (nonzero) digits is 18579456, while the sum is 59.

The spelling of 840440298794 in words is "eight hundred forty billion, four hundred forty million, two hundred ninety-eight thousand, seven hundred ninety-four".