87312312 has 24 divisors (see below), whose sum is σ = 236471040. Its totient is φ = 29104080.

The previous prime is 87312311. The next prime is 87312331. The reversal of 87312312 is 21321378.

It is a tau number, because it is divible by the number of its divisors (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87312311) 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 5 ways as a sum of consecutive naturals, for example, 606264 + ... + 606407.

It is an arithmetic number, because the mean of its divisors is an integer number (9852960).

Almost surely, 2^87312312 is an apocalyptic number.

It is an amenable number.

87312312 is an abundant number, since it is smaller than the sum of its proper divisors (149158728).

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

87312312 is a wasteful number, since it uses less digits than its factorization.

87312312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1212683 (or 1212676 counting only the distinct ones).

The product of its digits is 2016, while the sum is 27.

The square root of 87312312 is about 9344.1057357031. The cubic root of 87312312 is about 443.6343471136.

The spelling of 87312312 in words is "eighty-seven million, three hundred twelve thousand, three hundred twelve".