87543920 has 20 divisors (see below), whose sum is σ = 203539800. Its totient is φ = 35017536.

The previous prime is 87543913. The next prime is 87543941. The reversal of 87543920 is 2934578.

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

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 3 ways as a sum of consecutive naturals, for example, 547070 + ... + 547229.

It is an arithmetic number, because the mean of its divisors is an integer number (10176990).

Almost surely, 2^87543920 is an apocalyptic number.

87543920 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

87543920 is an abundant number, since it is smaller than the sum of its proper divisors (115995880).

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

87543920 is a wasteful number, since it uses less digits than its factorization.

87543920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1094312 (or 1094306 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 38.

The square root of 87543920 is about 9356.4907951646. The cubic root of 87543920 is about 444.0262679587.

The spelling of 87543920 in words is "eighty-seven million, five hundred forty-three thousand, nine hundred twenty".