8491812 has 48 divisors (see below), whose sum is σ = 23181312. Its totient is φ = 2368800.

The previous prime is 8491801. The next prime is 8491817. The reversal of 8491812 is 2181948.

It is a super-2 number, since 2×8491812² = 144221742086688, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (8491817) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2437 + ... + 4787.

It is an arithmetic number, because the mean of its divisors is an integer number (482944).

Almost surely, 2^8491812 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8491812, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11590656).

8491812 is an abundant number, since it is smaller than the sum of its proper divisors (14689500).

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

8491812 is a wasteful number, since it uses less digits than its factorization.

8491812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2408 (or 2406 counting only the distinct ones).

The product of its digits is 4608, while the sum is 33.

The square root of 8491812 is about 2914.0713786728. The cubic root of 8491812 is about 204.0172034704.

The spelling of 8491812 in words is "eight million, four hundred ninety-one thousand, eight hundred twelve".