87180534 has 96 divisors (see below), whose sum is σ = 229132800. Its totient is φ = 23417856.

The previous prime is 87180521. The next prime is 87180553. The reversal of 87180534 is 43508178.

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 47 ways as a sum of consecutive naturals, for example, 193942 + ... + 194390.

It is an arithmetic number, because the mean of its divisors is an integer number (2386800).

Almost surely, 2^87180534 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 87180534, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (114566400).

87180534 is an abundant number, since it is smaller than the sum of its proper divisors (141952266).

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

87180534 is a wasteful number, since it uses less digits than its factorization.

87180534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 554 (or 551 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 36.

The square root of 87180534 is about 9337.0516759842. The cubic root of 87180534 is about 443.4110464831.

The spelling of 87180534 in words is "eighty-seven million, one hundred eighty thousand, five hundred thirty-four".