87555500 has 48 divisors (see below), whose sum is σ = 195931008. Its totient is φ = 34160000.

The previous prime is 87555487. The next prime is 87555509. The reversal of 87555500 is 555578.

It is a nialpdrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (87555509) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18365 + ... + 22635.

It is an arithmetic number, because the mean of its divisors is an integer number (4081896).

Almost surely, 2^87555500 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 87555500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (97965504).

87555500 is an abundant number, since it is smaller than the sum of its proper divisors (108375508).

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

87555500 is a wasteful number, since it uses less digits than its factorization.

87555500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4331 (or 4319 counting only the distinct ones).

The product of its (nonzero) digits is 35000, while the sum is 35.

The square root of 87555500 is about 9357.1095964512. The cubic root of 87555500 is about 444.0458451701.

The spelling of 87555500 in words is "eighty-seven million, five hundred fifty-five thousand, five hundred".