89821688 has 24 divisors (see below), whose sum is σ = 185120040. Its totient is φ = 40827600.

The previous prime is 89821679. The next prime is 89821691. The reversal of 89821688 is 88612898.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 45428 + ... + 47363.

It is an arithmetic number, because the mean of its divisors is an integer number (7713335).

Almost surely, 2^89821688 is an apocalyptic number.

89821688 is a gapful number since it is divisible by the number (88) formed by its first and last digit.

It is an amenable number.

89821688 is an abundant number, since it is smaller than the sum of its proper divisors (95298352).

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

89821688 is a wasteful number, since it uses less digits than its factorization.

89821688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92819 (or 92804 counting only the distinct ones).

The product of its digits is 442368, while the sum is 50.

The square root of 89821688 is about 9477.4304534510. The cubic root of 89821688 is about 447.8443203763.

It can be divided in two parts, 89821 and 688, that added together give a palindrome (90509).

The spelling of 89821688 in words is "eighty-nine million, eight hundred twenty-one thousand, six hundred eighty-eight".