784078434 has 32 divisors (see below), whose sum is σ = 1834104000. Its totient is φ = 247603392.

The previous prime is 784078417. The next prime is 784078439. The reversal of 784078434 is 434870487.

784078434 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×784078434² = 1229557981327784712, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 784078434.

It is not an unprimeable number, because it can be changed into a prime (784078439) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 381079 + ... + 383130.

It is an arithmetic number, because the mean of its divisors is an integer number (57315750).

Almost surely, 2^784078434 is an apocalyptic number.

784078434 is an abundant number, since it is smaller than the sum of its proper divisors (1050025566).

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

784078434 is a wasteful number, since it uses less digits than its factorization.

784078434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 764239 (or 764233 counting only the distinct ones).

The product of its (nonzero) digits is 602112, while the sum is 45.

The square root of 784078434 is about 28001.4005721142. The cubic root of 784078434 is about 922.1180069578.

The spelling of 784078434 in words is "seven hundred eighty-four million, seventy-eight thousand, four hundred thirty-four".