87226218 has 48 divisors (see below), whose sum is σ = 203431176. Its totient is φ = 26910720.

The previous prime is 87226213. The next prime is 87226259. The reversal of 87226218 is 81262278.

It is a happy number.

87226218 is a `hidden beast` number, since 8 + 7 + 22 + 621 + 8 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 81595089 + 5631129 = 9033^2 + 2373^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (87226213) 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, 16330 + ... + 21002.

Almost surely, 2^87226218 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 87226218, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (101715588).

87226218 is an abundant number, since it is smaller than the sum of its proper divisors (116204958).

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

87226218 is a wasteful number, since it uses less digits than its factorization.

87226218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4759 (or 4756 counting only the distinct ones).

The product of its digits is 21504, while the sum is 36.

The square root of 87226218 is about 9339.4977381013. The cubic root of 87226218 is about 443.4884844617.

The spelling of 87226218 in words is "eighty-seven million, two hundred twenty-six thousand, two hundred eighteen".