89812 has 6 divisors (see below), whose sum is σ = 157178. Its totient is φ = 44904.

The previous prime is 89809. The next prime is 89819. The reversal of 89812 is 21898.

It can be written as a sum of positive squares in only one way, i.e., 59536 + 30276 = 244^2 + 174^2 .

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (89819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11223 + ... + 11230.

2⁸⁹⁸¹² is an apocalyptic number.

It is an amenable number.

89812 is a deficient number, since it is larger than the sum of its proper divisors (67366).

89812 is a wasteful number, since it uses less digits than its factorization.

89812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22457 (or 22455 counting only the distinct ones).

The product of its digits is 1152, while the sum is 28.

The square root of 89812 is about 299.6865028659. The cubic root of 89812 is about 44.7828218579.

The spelling of 89812 in words is "eighty-nine thousand, eight hundred twelve".