84218285 has 8 divisors (see below), whose sum is σ = 101131800. Its totient is φ = 67328064.

The previous prime is 84218273. The next prime is 84218333. The reversal of 84218285 is 58281248.

It can be written as a sum of positive squares in 4 ways, for example, as 3613801 + 80604484 = 1901^2 + 8978^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 84218285 - 2⁴ = 84218269 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 3491 + ... + 13439.

It is an arithmetic number, because the mean of its divisors is an integer number (12641475).

Almost surely, 2^84218285 is an apocalyptic number.

It is an amenable number.

84218285 is a deficient number, since it is larger than the sum of its proper divisors (16913515).

84218285 is a wasteful number, since it uses less digits than its factorization.

84218285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11647.

The product of its digits is 40960, while the sum is 38.

The square root of 84218285 is about 9177.0520865908. The cubic root of 84218285 is about 438.3309443246.

The spelling of 84218285 in words is "eighty-four million, two hundred eighteen thousand, two hundred eighty-five".