8981644 has 24 divisors (see below), whose sum is σ = 19020960. Its totient is φ = 3622656.

The previous prime is 8981633. The next prime is 8981647. The reversal of 8981644 is 4461898.

8981644 = T₁₄₇ + T₁₄₈ + ... + T₃₈₄.

It is a junction number, because it is equal to n+sod(n) for n = 8981597 and 8981606.

It is not an unprimeable number, because it can be changed into a prime (8981647) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8959 + ... + 9910.

It is an arithmetic number, because the mean of its divisors is an integer number (792540).

Almost surely, 2^8981644 is an apocalyptic number.

It is an amenable number.

8981644 is an abundant number, since it is smaller than the sum of its proper divisors (10039316).

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

8981644 is a wasteful number, since it uses less digits than its factorization.

8981644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18897 (or 18895 counting only the distinct ones).

The product of its digits is 55296, while the sum is 40.

The square root of 8981644 is about 2996.9391051538. The cubic root of 8981644 is about 207.8668711710.

The spelling of 8981644 in words is "eight million, nine hundred eighty-one thousand, six hundred forty-four".