84828561 has 16 divisors (see below), whose sum is σ = 115976448. Its totient is φ = 55126400.

The previous prime is 84828533. The next prime is 84828571. The reversal of 84828561 is 16582848.

It is a cyclic number.

It is not a de Polignac number, because 84828561 - 2⁵ = 84828529 is a prime.

It is a super-2 number, since 2×84828561² = 14391769522661442, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (84828571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38551 + ... + 40691.

It is an arithmetic number, because the mean of its divisors is an integer number (7248528).

Almost surely, 2^84828561 is an apocalyptic number.

It is an amenable number.

84828561 is a deficient number, since it is larger than the sum of its proper divisors (31147887).

84828561 is a wasteful number, since it uses less digits than its factorization.

84828561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2472.

The product of its digits is 122880, while the sum is 42.

The square root of 84828561 is about 9210.2421792263. The cubic root of 84828561 is about 439.3871650864.

The spelling of 84828561 in words is "eighty-four million, eight hundred twenty-eight thousand, five hundred sixty-one".