89971856 has 20 divisors (see below), whose sum is σ = 187730172. Its totient is φ = 41525376.

The previous prime is 89971853. The next prime is 89971879. The reversal of 89971856 is 65817998.

It can be written as a sum of positive squares in 2 ways, for example, as 12250000 + 77721856 = 3500^2 + 8816^2 .

It is a junction number, because it is equal to n+sod(n) for n = 89971798 and 89971807.

It is not an unprimeable number, because it can be changed into a prime (89971853) 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, 216071 + ... + 216486.

Almost surely, 2^89971856 is an apocalyptic number.

It is an amenable number.

89971856 is an abundant number, since it is smaller than the sum of its proper divisors (97758316).

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

89971856 is a wasteful number, since it uses less digits than its factorization.

89971856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 432578 (or 432572 counting only the distinct ones).

The product of its digits is 1088640, while the sum is 53.

The square root of 89971856 is about 9485.3495454833. The cubic root of 89971856 is about 448.0937569504.

The spelling of 89971856 in words is "eighty-nine million, nine hundred seventy-one thousand, eight hundred fifty-six".