87528641 has 4 divisors (see below), whose sum is σ = 90546900. Its totient is φ = 84510384.

The previous prime is 87528613. The next prime is 87528659. The reversal of 87528641 is 14682578.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 36048016 + 51480625 = 6004^2 + 7175^2 .

It is a cyclic number.

It is not a de Polignac number, because 87528641 - 2⁶ = 87528577 is a prime.

It is a super-2 number, since 2×87528641² = 15322525990613762, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87558641) 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, 1509086 + ... + 1509143.

It is an arithmetic number, because the mean of its divisors is an integer number (22636725).

Almost surely, 2^87528641 is an apocalyptic number.

It is an amenable number.

87528641 is a deficient number, since it is larger than the sum of its proper divisors (3018259).

87528641 is a wasteful number, since it uses less digits than its factorization.

87528641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3018258.

The product of its digits is 107520, while the sum is 41.

The square root of 87528641 is about 9355.6742675234. The cubic root of 87528641 is about 444.0004345558. Note that the first 3 decimals are identical.

The spelling of 87528641 in words is "eighty-seven million, five hundred twenty-eight thousand, six hundred forty-one".