8445981 has 16 divisors (see below), whose sum is σ = 11708928. Its totient is φ = 5409600.

The previous prime is 8445979. The next prime is 8446001. The reversal of 8445981 is 1895448.

It is not a de Polignac number, because 8445981 - 2¹ = 8445979 is a prime.

It is a super-2 number, since 2×8445981² = 142669190104722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8445911) 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, 18091 + ... + 18551.

It is an arithmetic number, because the mean of its divisors is an integer number (731808).

Almost surely, 2^8445981 is an apocalyptic number.

It is an amenable number.

8445981 is a deficient number, since it is larger than the sum of its proper divisors (3262947).

8445981 is a wasteful number, since it uses less digits than its factorization.

8445981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 692.

The product of its digits is 46080, while the sum is 39.

The square root of 8445981 is about 2906.1969995167. The cubic root of 8445981 is about 203.6495087021.

The spelling of 8445981 in words is "eight million, four hundred forty-five thousand, nine hundred eighty-one".