87131382 has 16 divisors (see below), whose sum is σ = 187667760. Its totient is φ = 26809632.

The previous prime is 87131371. The next prime is 87131393. The reversal of 87131382 is 28313178.

It is an interprime number because it is at equal distance from previous prime (87131371) and next prime (87131393).

It is a congruent number.

It is an unprimeable number.

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, 558457 + ... + 558612.

It is an arithmetic number, because the mean of its divisors is an integer number (11729235).

Almost surely, 2^87131382 is an apocalyptic number.

87131382 is an abundant number, since it is smaller than the sum of its proper divisors (100536378).

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

87131382 is a wasteful number, since it uses less digits than its factorization.

87131382 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1117087.

The product of its digits is 8064, while the sum is 33.

The square root of 87131382 is about 9334.4192106419. The cubic root of 87131382 is about 443.3276997544.

The spelling of 87131382 in words is "eighty-seven million, one hundred thirty-one thousand, three hundred eighty-two".