834204478 has 4 divisors (see below), whose sum is σ = 1251306720. Its totient is φ = 417102238.

The previous prime is 834204473. The next prime is 834204493. The reversal of 834204478 is 874402438.

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

It is a super-2 number, since 2×834204478² = 1391794222230504968, 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 834204478.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (834204473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 208551118 + ... + 208551121.

It is an arithmetic number, because the mean of its divisors is an integer number (312826680).

Almost surely, 2^834204478 is an apocalyptic number.

834204478 is a deficient number, since it is larger than the sum of its proper divisors (417102242).

834204478 is a wasteful number, since it uses less digits than its factorization.

834204478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 417102241.

The product of its (nonzero) digits is 172032, while the sum is 40.

The square root of 834204478 is about 28882.5981864513. The cubic root of 834204478 is about 941.3638260911.

The spelling of 834204478 in words is "eight hundred thirty-four million, two hundred four thousand, four hundred seventy-eight".