428480306 has 4 divisors (see below), whose sum is σ = 642720462. Its totient is φ = 214240152.

The previous prime is 428480303. The next prime is 428480333. The reversal of 428480306 is 603084824.

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

It can be written as a sum of positive squares in only one way, i.e., 332734081 + 95746225 = 18241^2 + 9785^2 .

It is a super-3 number, since 3×428480306³ (a number of 27 digits) contains 333 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (428480303) 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 as a sum of consecutive naturals, namely, 107120075 + ... + 107120078.

Almost surely, 2^428480306 is an apocalyptic number.

428480306 is a deficient number, since it is larger than the sum of its proper divisors (214240156).

428480306 is a wasteful number, since it uses less digits than its factorization.

428480306 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214240155.

The product of its (nonzero) digits is 36864, while the sum is 35.

The square root of 428480306 is about 20699.7658440863. The cubic root of 428480306 is about 753.8940027409.

The spelling of 428480306 in words is "four hundred twenty-eight million, four hundred eighty thousand, three hundred six".