87540222 has 64 divisors (see below), whose sum is σ = 220838400. Its totient is φ = 22471680.

The previous prime is 87540199. The next prime is 87540223. The reversal of 87540222 is 22204578.

It is a self number, because there is not a number n which added to its sum of digits gives 87540222.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87540223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 40054 + ... + 42182.

It is an arithmetic number, because the mean of its divisors is an integer number (3450600).

Almost surely, 2^87540222 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 87540222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (110419200).

87540222 is an abundant number, since it is smaller than the sum of its proper divisors (133298178).

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

87540222 is a wasteful number, since it uses less digits than its factorization.

87540222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2241.

The product of its (nonzero) digits is 8960, while the sum is 30.

The square root of 87540222 is about 9356.2931762531. The cubic root of 87540222 is about 444.0200157359.

The spelling of 87540222 in words is "eighty-seven million, five hundred forty thousand, two hundred twenty-two".