428916287 has 4 divisors (see below), whose sum is σ = 431484816. Its totient is φ = 426347760.

The previous prime is 428916283. The next prime is 428916343. The reversal of 428916287 is 782619824.

It is a happy number.

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 428916287 - 2² = 428916283 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428916281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1284014 + ... + 1284347.

It is an arithmetic number, because the mean of its divisors is an integer number (107871204).

Almost surely, 2^428916287 is an apocalyptic number.

428916287 is a deficient number, since it is larger than the sum of its proper divisors (2568529).

428916287 is a wasteful number, since it uses less digits than its factorization.

428916287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2568528.

The product of its digits is 387072, while the sum is 47.

The square root of 428916287 is about 20710.2942277506. The cubic root of 428916287 is about 754.1496131237.

The spelling of 428916287 in words is "four hundred twenty-eight million, nine hundred sixteen thousand, two hundred eighty-seven".