87312822 has 16 divisors (see below), whose sum is σ = 179345712. Its totient is φ = 28317600.

The previous prime is 87312817. The next prime is 87312829. The reversal of 87312822 is 22821378.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87312829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 196429 + ... + 196872.

It is an arithmetic number, because the mean of its divisors is an integer number (11209107).

Almost surely, 2^87312822 is an apocalyptic number.

87312822 is an abundant number, since it is smaller than the sum of its proper divisors (92032890).

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

87312822 is a wasteful number, since it uses less digits than its factorization.

87312822 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 393343.

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

The square root of 87312822 is about 9344.1330255942. The cubic root of 87312822 is about 443.6352108829.

It can be divided in two parts, 873 and 12822, that added together give a triangular number (13695 = T₁₆₅).

The spelling of 87312822 in words is "eighty-seven million, three hundred twelve thousand, eight hundred twenty-two".