828569889 has 24 divisors (see below), whose sum is σ = 1370703360. Its totient is φ = 472462848.

The previous prime is 828569887. The next prime is 828569921. The reversal of 828569889 is 988965828.

It is not a de Polignac number, because 828569889 - 2¹ = 828569887 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (828569887) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16449 + ... + 43905.

It is an arithmetic number, because the mean of its divisors is an integer number (57112640).

Almost surely, 2^828569889 is an apocalyptic number.

It is an amenable number.

828569889 is a deficient number, since it is larger than the sum of its proper divisors (542133471).

828569889 is a wasteful number, since it uses less digits than its factorization.

828569889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27949 (or 27946 counting only the distinct ones).

The product of its digits is 19906560, while the sum is 63.

The square root of 828569889 is about 28784.8899424681. The cubic root of 828569889 is about 939.2395724969.

The spelling of 828569889 in words is "eight hundred twenty-eight million, five hundred sixty-nine thousand, eight hundred eighty-nine".