428765589 has 32 divisors (see below), whose sum is σ = 731709440. Its totient is φ = 243066096.

The previous prime is 428765581. The next prime is 428765611. The reversal of 428765589 is 985567824.

428765589 is a `hidden beast` number, since 4 + 2 + 87 + 6 + 558 + 9 = 666.

It is not a de Polignac number, because 428765589 - 2³ = 428765581 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428765581) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15072 + ... + 32934.

It is an arithmetic number, because the mean of its divisors is an integer number (22865920).

Almost surely, 2^428765589 is an apocalyptic number.

It is an amenable number.

428765589 is a deficient number, since it is larger than the sum of its proper divisors (302943851).

428765589 is a wasteful number, since it uses less digits than its factorization.

428765589 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18006 (or 18000 counting only the distinct ones).

The product of its digits is 4838400, while the sum is 54.

The square root of 428765589 is about 20706.6556691321. The cubic root of 428765589 is about 754.0612803072.

The spelling of 428765589 in words is "four hundred twenty-eight million, seven hundred sixty-five thousand, five hundred eighty-nine".