8971812 has 18 divisors (see below), whose sum is σ = 22678838. Its totient is φ = 2990592.

The previous prime is 8971811. The next prime is 8971813. The reversal of 8971812 is 2181798.

It is an interprime number because it is at equal distance from previous prime (8971811) and next prime (8971813).

It can be written as a sum of positive squares in only one way, i.e., 5308416 + 3663396 = 2304^2 + 1914^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 249217 = 8971812 / (8 + 9 + 7 + 1 + 8 + 1 + 2).

It is not an unprimeable number, because it can be changed into a prime (8971811) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 124573 + ... + 124644.

Almost surely, 2^8971812 is an apocalyptic number.

It is an amenable number.

8971812 is an abundant number, since it is smaller than the sum of its proper divisors (13707026).

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

8971812 is a wasteful number, since it uses less digits than its factorization.

8971812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 249227 (or 249222 counting only the distinct ones).

The product of its digits is 8064, while the sum is 36.

The square root of 8971812 is about 2995.2983156941. The cubic root of 8971812 is about 207.7909944429.

The spelling of 8971812 in words is "eight million, nine hundred seventy-one thousand, eight hundred twelve".