428471289 has 20 divisors (see below), whose sum is σ = 641203200. Its totient is φ = 285138360.

The previous prime is 428471287. The next prime is 428471291. The reversal of 428471289 is 982174824.

It is an interprime number because it is at equal distance from previous prime (428471287) and next prime (428471291).

It is not a de Polignac number, because 428471289 - 2¹ = 428471287 is a prime.

It is not an unprimeable number, because it can be changed into a prime (428471287) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 44104 + ... + 52934.

It is an arithmetic number, because the mean of its divisors is an integer number (32060160).

Almost surely, 2^428471289 is an apocalyptic number.

It is an amenable number.

428471289 is a deficient number, since it is larger than the sum of its proper divisors (212731911).

428471289 is an equidigital number, since it uses as much as digits as its factorization.

428471289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9442 (or 9433 counting only the distinct ones).

The product of its digits is 258048, while the sum is 45.

The square root of 428471289 is about 20699.5480385442. The cubic root of 428471289 is about 753.8887143532. Note that the first 3 decimals are identical.

The spelling of 428471289 in words is "four hundred twenty-eight million, four hundred seventy-one thousand, two hundred eighty-nine".