87143487920 has 20 divisors (see below), whose sum is σ = 202608609600. Its totient is φ = 34857395136.

The previous prime is 87143487913. The next prime is 87143487929. The reversal of 87143487920 is 2978434178.

It is a tau number, because it is divible by the number of its divisors (20).

It is not an unprimeable number, because it can be changed into a prime (87143487929) 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 3 ways as a sum of consecutive naturals, for example, 544646720 + ... + 544646879.

It is an arithmetic number, because the mean of its divisors is an integer number (10130430480).

Almost surely, 2^87143487920 is an apocalyptic number.

87143487920 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

87143487920 is an abundant number, since it is smaller than the sum of its proper divisors (115465121680).

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

87143487920 is a wasteful number, since it uses less digits than its factorization.

87143487920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1089293612 (or 1089293606 counting only the distinct ones).

The product of its (nonzero) digits is 2709504, while the sum is 53.

The spelling of 87143487920 in words is "eighty-seven billion, one hundred forty-three million, four hundred eighty-seven thousand, nine hundred twenty".