87528217782 has 32 divisors (see below), whose sum is σ = 178998746112. Its totient is φ = 28520532864.

The previous prime is 87528217669. The next prime is 87528217783. The reversal of 87528217782 is 28771282578.

It is a super-2 number, since 2×87528217782² (a number of 23 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (57) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87528217783) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43518 + ... + 420654.

It is an arithmetic number, because the mean of its divisors is an integer number (5593710816).

Almost surely, 2^87528217782 is an apocalyptic number.

87528217782 is an abundant number, since it is smaller than the sum of its proper divisors (91470528330).

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

87528217782 is a wasteful number, since it uses less digits than its factorization.

87528217782 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 378012.

The product of its digits is 7024640, while the sum is 57.

The spelling of 87528217782 in words is "eighty-seven billion, five hundred twenty-eight million, two hundred seventeen thousand, seven hundred eighty-two".