84218850 has 144 divisors (see below), whose sum is σ = 244169640. Its totient is φ = 20736000.

The previous prime is 84218809. The next prime is 84218861. The reversal of 84218850 is 5881248.

It can be written as a sum of positive squares in 12 ways, for example, as 42732369 + 41486481 = 6537^2 + 6441^2 .

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 71 ways as a sum of consecutive naturals, for example, 772596 + ... + 772704.

Almost surely, 2^84218850 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 84218850, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (122084820).

84218850 is an abundant number, since it is smaller than the sum of its proper divisors (159950790).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

84218850 is a wasteful number, since it uses less digits than its factorization.

84218850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245 (or 237 counting only the distinct ones).

The product of its (nonzero) digits is 20480, while the sum is 36.

The square root of 84218850 is about 9177.0828698449. The cubic root of 84218850 is about 438.3319245410.

It can be divided in two parts, 8421 and 8850, that added together give a palindrome (17271).

The spelling of 84218850 in words is "eighty-four million, two hundred eighteen thousand, eight hundred fifty".