834564378 has 32 divisors (see below), whose sum is σ = 1773365760. Its totient is φ = 261334080.

The previous prime is 834564373. The next prime is 834564413. The reversal of 834564378 is 873465438.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (834564373) 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, 58378 + ... + 71253.

It is an arithmetic number, because the mean of its divisors is an integer number (55417680).

Almost surely, 2^834564378 is an apocalyptic number.

834564378 is an abundant number, since it is smaller than the sum of its proper divisors (938801382).

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

834564378 is a wasteful number, since it uses less digits than its factorization.

834564378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129702.

The product of its digits is 1935360, while the sum is 48.

The square root of 834564378 is about 28888.8279097647. The cubic root of 834564378 is about 941.4991838439.

The spelling of 834564378 in words is "eight hundred thirty-four million, five hundred sixty-four thousand, three hundred seventy-eight".