87081810 has 32 divisors (see below), whose sum is σ = 210002112. Its totient is φ = 23110080.

The previous prime is 87081791. The next prime is 87081859. The reversal of 87081810 is 1818078.

It is a super-2 number, since 2×87081810² = 15166483265752200, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 549 + ... + 13208.

It is an arithmetic number, because the mean of its divisors is an integer number (6562566).

Almost surely, 2^87081810 is an apocalyptic number.

87081810 is an abundant number, since it is smaller than the sum of its proper divisors (122920302).

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

87081810 is a wasteful number, since it uses less digits than its factorization.

87081810 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13978.

The product of its (nonzero) digits is 3584, while the sum is 33.

The square root of 87081810 is about 9331.7634989320. The cubic root of 87081810 is about 443.2436090809.

Adding to 87081810 its reverse (1818078), we get a palindrome (88899888).

The spelling of 87081810 in words is "eighty-seven million, eighty-one thousand, eight hundred ten".