87081558 has 16 divisors (see below), whose sum is σ = 174265776. Its totient is φ = 29010080.

The previous prime is 87081557. The next prime is 87081559. The reversal of 87081558 is 85518078.

It is an interprime number because it is at equal distance from previous prime (87081557) and next prime (87081559).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87081551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10888 + ... + 17108.

It is an arithmetic number, because the mean of its divisors is an integer number (10891611).

Almost surely, 2^87081558 is an apocalyptic number.

87081558 is an abundant number, since it is smaller than the sum of its proper divisors (87184218).

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

87081558 is a wasteful number, since it uses less digits than its factorization.

87081558 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8559.

The product of its (nonzero) digits is 89600, while the sum is 42.

The square root of 87081558 is about 9331.7499966512. The cubic root of 87081558 is about 443.2431815231.

It can be divided in two parts, 870 and 81558, that added together give a palindrome (82428).

The spelling of 87081558 in words is "eighty-seven million, eighty-one thousand, five hundred fifty-eight".