87321822 has 48 divisors (see below), whose sum is σ = 204201360. Its totient is φ = 24820992.

The previous prime is 87321803. The next prime is 87321827. The reversal of 87321822 is 22812378.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87321827) 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, 66678 + ... + 67974.

It is an arithmetic number, because the mean of its divisors is an integer number (4254195).

Almost surely, 2^87321822 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 87321822, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (102100680).

87321822 is an abundant number, since it is smaller than the sum of its proper divisors (116879538).

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

87321822 is a wasteful number, since it uses less digits than its factorization.

87321822 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1545 (or 1538 counting only the distinct ones).

The product of its digits is 10752, while the sum is 33.

The square root of 87321822 is about 9344.6145987943. The cubic root of 87321822 is about 443.6504533167.

The spelling of 87321822 in words is "eighty-seven million, three hundred twenty-one thousand, eight hundred twenty-two".