87821056 has 18 divisors (see below), whose sum is σ = 175299572. Its totient is φ = 43910400.

The previous prime is 87821033. The next prime is 87821081. The reversal of 87821056 is 65012878.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 171270 + ... + 171781.

Almost surely, 2^87821056 is an apocalyptic number.

It is an amenable number.

87821056 is a deficient number, since it is larger than the sum of its proper divisors (87478516).

87821056 is an equidigital number, since it uses as much as digits as its factorization.

87821056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 343067 (or 343053 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 37.

The square root of 87821056 is about 9371.2889188201. The cubic root of 87821056 is about 444.4943226984.

The spelling of 87821056 in words is "eighty-seven million, eight hundred twenty-one thousand, fifty-six".