828023569 has 4 divisors (see below), whose sum is σ = 838504960. Its totient is φ = 817542180.

The previous prime is 828023561. The next prime is 828023633. The reversal of 828023569 is 965320828.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 828023569 - 2³ = 828023561 is a prime.

It is a super-2 number, since 2×828023569² = 1371246061638995522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (828023561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5240577 + ... + 5240734.

It is an arithmetic number, because the mean of its divisors is an integer number (209626240).

Almost surely, 2^828023569 is an apocalyptic number.

It is an amenable number.

828023569 is a deficient number, since it is larger than the sum of its proper divisors (10481391).

828023569 is a wasteful number, since it uses less digits than its factorization.

828023569 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10481390.

The product of its (nonzero) digits is 207360, while the sum is 43.

The square root of 828023569 is about 28775.3986766474. The cubic root of 828023569 is about 939.0330969828.

The spelling of 828023569 in words is "eight hundred twenty-eight million, twenty-three thousand, five hundred sixty-nine".