428734478 has 4 divisors (see below), whose sum is σ = 643101720. Its totient is φ = 214367238.

The previous prime is 428734459. The next prime is 428734483. The reversal of 428734478 is 874437824.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107183618 + ... + 107183621.

It is an arithmetic number, because the mean of its divisors is an integer number (160775430).

Almost surely, 2^428734478 is an apocalyptic number.

428734478 is a deficient number, since it is larger than the sum of its proper divisors (214367242).

428734478 is a wasteful number, since it uses less digits than its factorization.

428734478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214367241.

The product of its digits is 1204224, while the sum is 47.

The square root of 428734478 is about 20705.9044236179. The cubic root of 428734478 is about 754.0430417727.

The spelling of 428734478 in words is "four hundred twenty-eight million, seven hundred thirty-four thousand, four hundred seventy-eight".