428516669 has 8 divisors (see below), whose sum is σ = 493590528. Its totient is φ = 364407120.

The previous prime is 428516663. The next prime is 428516681. The reversal of 428516669 is 966615824.

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

It is a de Polignac number, because none of the positive numbers 2^k-428516669 is a prime.

It is a super-2 number, since 2×428516669² = 367253071221711122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428516663) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 240122 + ... + 241899.

It is an arithmetic number, because the mean of its divisors is an integer number (61698816).

Almost surely, 2^428516669 is an apocalyptic number.

It is an amenable number.

428516669 is a deficient number, since it is larger than the sum of its proper divisors (65073859).

428516669 is a wasteful number, since it uses less digits than its factorization.

428516669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 482155.

The product of its digits is 622080, while the sum is 47.

The square root of 428516669 is about 20700.6441687209. The cubic root of 428516669 is about 753.9153285535.

The spelling of 428516669 in words is "four hundred twenty-eight million, five hundred sixteen thousand, six hundred sixty-nine".