428478346 has 8 divisors (see below), whose sum is σ = 648614340. Its totient is φ = 212273568.

The previous prime is 428478343. The next prime is 428478361. The reversal of 428478346 is 643874824.

It can be written as a sum of positive squares in 2 ways, for example, as 417752721 + 10725625 = 20439^2 + 3275^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 428478296 and 428478305.

It is not an unprimeable number, because it can be changed into a prime (428478343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 982531 + ... + 982966.

Almost surely, 2^428478346 is an apocalyptic number.

428478346 is a deficient number, since it is larger than the sum of its proper divisors (220135994).

428478346 is a wasteful number, since it uses less digits than its factorization.

428478346 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1965608.

The product of its digits is 1032192, while the sum is 46.

The square root of 428478346 is about 20699.7185005014. The cubic root of 428478346 is about 753.8928532252.

It can be divided in two parts, 428478 and 346, that added together give a palindrome (428824).

The spelling of 428478346 in words is "four hundred twenty-eight million, four hundred seventy-eight thousand, three hundred forty-six".