434878 has 4 divisors (see below), whose sum is σ = 652320. Its totient is φ = 217438.

The previous prime is 434873. The next prime is 434881. The reversal of 434878 is 878434.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 878434 = 2 ⋅439217.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (434873) by changing a digit.

434878 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108718 + ... + 108721.

It is an arithmetic number, because the mean of its divisors is an integer number (163080).

2⁴³⁴⁸⁷⁸ is an apocalyptic number.

434878 is a deficient number, since it is larger than the sum of its proper divisors (217442).

434878 is a wasteful number, since it uses less digits than its factorization.

434878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217441.

The product of its digits is 21504, while the sum is 34.

The square root of 434878 is about 659.4528034666. The cubic root of 434878 is about 75.7627643897.

Subtracting 434878 from its reverse (878434), we obtain a square (443556 = 666²).

The spelling of 434878 in words is "four hundred thirty-four thousand, eight hundred seventy-eight".