428280667 has 4 divisors (see below), whose sum is σ = 428885440. Its totient is φ = 427675896.

The previous prime is 428280649. The next prime is 428280679. The reversal of 428280667 is 766082824.

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

It is a cyclic number.

It is not a de Polignac number, because 428280667 - 2¹¹ = 428278619 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (428284667) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 301323 + ... + 302740.

It is an arithmetic number, because the mean of its divisors is an integer number (107221360).

Almost surely, 2^428280667 is an apocalyptic number.

428280667 is a deficient number, since it is larger than the sum of its proper divisors (604773).

428280667 is an equidigital number, since it uses as much as digits as its factorization.

428280667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 604772.

The product of its (nonzero) digits is 258048, while the sum is 43.

The square root of 428280667 is about 20694.9430296389. The cubic root of 428280667 is about 753.7768989334.

The spelling of 428280667 in words is "four hundred twenty-eight million, two hundred eighty thousand, six hundred sixty-seven".