89788 has 6 divisors (see below), whose sum is σ = 157136. Its totient is φ = 44892.

The previous prime is 89783. The next prime is 89797. The reversal of 89788 is 88798.

It is a self number, because there is not a number n which added to its sum of digits gives 89788.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (89783) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11220 + ... + 11227.

2⁸⁹⁷⁸⁸ is an apocalyptic number.

It is an amenable number.

89788 is a deficient number, since it is larger than the sum of its proper divisors (67348).

89788 is a wasteful number, since it uses less digits than its factorization.

89788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22451 (or 22449 counting only the distinct ones).

The product of its digits is 32256, while the sum is 40.

The square root of 89788 is about 299.6464583472. The cubic root of 89788 is about 44.7788324746.

Subtracting from 89788 its reverse (88798), we obtain a triangular number (990 = T₄₄).

It can be divided in two parts, 8978 and 8, that multiplied together give a square (71824 = 268²).

The spelling of 89788 in words is "eighty-nine thousand, seven hundred eighty-eight".