87111380 has 18 divisors (see below), whose sum is σ = 183021594. Its totient is φ = 34827856.

The previous prime is 87111379. The next prime is 87111407. The reversal of 87111380 is 8311178.

It can be written as a sum of positive squares in only one way, i.e., 69689104 + 17422276 = 8348^2 + 4174^2 .

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 5 ways as a sum of consecutive naturals, for example, 40697 + ... + 42783.

Almost surely, 2^87111380 is an apocalyptic number.

It is an amenable number.

87111380 is an abundant number, since it is smaller than the sum of its proper divisors (95910214).

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

87111380 is an equidigital number, since it uses as much as digits as its factorization.

87111380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4183 (or 2094 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 29.

The square root of 87111380 is about 9333.3477380841. The cubic root of 87111380 is about 443.2937735192.

The spelling of 87111380 in words is "eighty-seven million, one hundred eleven thousand, three hundred eighty".